| Total  | |||||
| North  | Latin  | UK and  | EMEA and  | operating  | |
| America  | America  | Ireland  | Asia Pacific  | segments  | |
| Year ended 31 March 2025  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Revenue from external customers  | |||||
| Data  | 2,470  | 610  | 431  | 358  | 3,869  | 
| Decisioning  | 959  | 206  | 251  | 168  | 1,584  | 
| Business-to-Business  | 3,429  | 816  | 682  | 526  | 5,453  | 
| Consumer Services  | 1,617  | 250  | 187  | —  | 2,054  | 
| Ongoing activities  | 5,046  | 1,066  | 869  | 526  | 7,507  | 
| Exited business activities  | —  | 9  | —  | 7  | 16  | 
| Total  | 5,046  | 1,075  | 869  | 533  | 7,523  | 
| Total  | |||||
| North  | Latin  | UK and  | EMEA and  | operating  | |
| America  | America  | Ireland  | Asia Pacific  | segments  | |
| Year ended 31 March 2024  1  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Revenue from external customers  | |||||
| Data  | 2,231  | 669  | 423  | 304  | 3,627  | 
| Decisioning  | 889  | 212  | 244  | 137  | 1,482  | 
| Business-to-Business  | 3,120  | 881  | 667  | 441  | 5,109  | 
| Consumer Services  | 1,539  | 225  | 173  | —  | 1,937  | 
| Ongoing activities  | 4,659  | 1,106  | 840  | 441  | 7,046  | 
| Exited business activities  | —  | 21  | 4  | 26  | 51  | 
| Total  | 4,659  | 1,127  | 844  | 467  | 7,097  | 
| Total  | |||||||
| North  | Latin  | UK and  | EMEA and  | operating  | Central  | Total  | |
| America  | America  | Ireland  | Asia Pacific  | segments  | Activities  | Group  | |
| Year ended 31 March 2025  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Revenue from external customers  | |||||||
| Ongoing activities  | 5,046  | 1,066  | 869  | 526  | 7,507  | —  | 7,507  | 
| Exited business activities  | —  | 9  | —  | 7  | 16  | —  | 16  | 
| Total  | 5,046  | 1,075  | 869  | 533  | 7,523  | —  | 7,523  | 
| Reconciliation from Benchmark EBIT to profit/(loss) before tax  | |||||||
| Benchmark EBIT  | |||||||
| Ongoing activities  | 1,686  | 341  | 202  | 22  | 2,251  | (144)  | 2,107  | 
| Exited business activities  | —  | (5)  | 1  | (20)  | (24)  | —  | (24)  | 
| Total  | 1,686  | 336  | 203  | 2  | 2,227  | (144)  | 2,083  | 
| Net interest expense included in Benchmark PBT (note 16(b))  | (3)  | (1)  | 3  | (1)  | (2)  | (155)  | (157)  | 
| Benchmark PBT  | 1,683  | 335  | 206  | 1  | 2,225  | (299)  | 1,926  | 
| Exceptional items (note 15(a))  | (13)  | (3)  | (15)  | (5)  | (36)  | (3)  | (39)  | 
| Amortisation of acquisition intangibles (note 21)  | (123)  | (21)  | (6)  | (61)  | (211)  | —  | (211)  | 
| Acquisition and disposal expenses  | (10)  | (9)  | (1)  | (17)  | (37)  | —  | (37)  | 
| Adjustment to the fair value of contingent consideration  | 4  | (5)  | —  | —  | (1)  | —  | (1)  | 
| Interest on uncertain tax provisions  | —  | —  | —  | —  | —  | (4)  | (4)  | 
| Financing fair value remeasurements (note 16(c))  | —  | —  | —  | —  | —  | (85)  | (85)  | 
| Profit/(loss) before tax  | 1,541  | 297  | 184  | (82)  | 1,940  | (391)  | 1,549  | 
| Total  | |||||||
| North  | Latin  | UK and  | EMEA and  | operating  | Central  | Total  | |
| America  | America  | Ireland  | Asia Pacific  | segments  | Activities  | Group  | |
| Year ended 31 March 2024¹  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Revenue from external customers  | |||||||
| Ongoing activities  |  4,659  |  1,106  |  840  |  441  |  7,046  | —  |  7,046  | 
| Exited business activities  | —  | 21  | 4  |  26  |  51  | —  |  51  | 
| Total  | 4,659  | 1,127  | 844  | 467  | 7,097  | —  | 7,097  | 
| Reconciliation from Benchmark EBIT to profit/(loss) before tax  | |||||||
| Benchmark EBIT  | |||||||
| Ongoing activities before transfer pricing and other adjustments  | 1,551  | 359  | 173  | 4  | 2,087  | (143)  | 1,944  | 
| Transfer pricing and other allocation adjustments  | (20)  | —  | 8  | 13  | 1  | (1)  | —  | 
| Ongoing activities  | 1,531  | 359  | 181  | 17  | 2,088  | (144)  | 1,944  | 
| Exited business activities  | —  | (5)  | 1  | (12)  | (16)  | —  | (16)  | 
| Total  | 1,531  | 354  | 182  | 5  | 2,072  | (144)  | 1,928  | 
| Net interest expense included in Benchmark PBT (note 16(b))  | (3)  | (2)  | (2)  | (1)  | (8)  | (131)  | (139)  | 
| Benchmark PBT  | 1,528  | 352  | 180  | 4  | 2,064  | (275)  | 1,789  | 
| Exceptional items (note 15(a))  | (1)  | —  | —  | 5  | 4  | —  | 4  | 
| Amortisation of acquisition intangibles (note 21)  | (112)  | (21)  | (7)  | (53)  | (193)  | —  | (193)  | 
| Acquisition and disposal expenses  | (1)  | (17)  | (7)  | (16)  | (41)  | —  | (41)  | 
| Adjustment to the fair value of contingent consideration  | 10  | (15)  | —  | —  | (5)  | 1  | (4)  | 
| Non-benchmark share of post-tax loss of associates  | —  | —  | (1)  | —  | (1)  | —  | (1)  | 
| Interest on uncertain tax provisions  | —  | —  | —  | —  | —  | 20  | 20  | 
| Financing fair value remeasurements (note 16(c))  | —  | —  | —  | —  | —  | (23)  | (23)  | 
| Profit/(loss) before tax  | 1,424  | 299  | 165  | (60)  | 1,828  | (277)  | 1,551  | 
| Total  | |||||
| North  | Latin  | UK and  | EMEA and  | ongoing  | |
| America  | America  | Ireland  | Asia Pacific  | activities  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | |
| Revenue for the year ended 31 March 2024  1  | 4,659  | 1,106  | 840  | 441  | 7,046  | 
| Adjustment to constant exchange rates  | —  | (1)  | (4)  | —  | (5)  | 
| Revenue at constant exchange rates for the year ended 31 March 2024  | 4,659  | 1,105  | 836  | 441  | 7,041  | 
| Organic revenue growth  | 352  | 65  | 11  | 37  | 465  | 
| Revenue from acquisitions  | 35  | 26  | 4  | 56  | 121  | 
| Revenue at constant exchange rates for the year ended 31 March 2025  | 5,046  | 1,196  | 851  | 534  | 7,627  | 
| Adjustment to actual exchange rates  | —  | (130)  | 18  | (8)  | (120)  | 
| Revenue for the year ended 31 March 2025  | 5,046  | 1,066  | 869  | 526  | 7,507  | 
| Organic revenue growth at constant exchange rates  | 8%  | 6%  | 1%  | 8%  | 7%  | 
| Revenue growth at constant exchange rates  | 8%  | 8%  | 2%  | 21%  | 8%  | 
| Total  | Total  | ||||||
| North  | Latin  | UK and  | EMEA and  | operating  | Central  | ongoing  | |
| America  | America  | Ireland  | Asia Pacific  | segments  | Activities  | activities  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| Benchmark EBIT for the year ended 31 March 2024  1  | 1,531  | 359  | 181  | 17  |  2,088  | (144)  |  1,944  | 
| Adjustment to constant exchange rates  | —  | —  | (1)  | 1  | —  | —  | —  | 
| Benchmark EBIT at constant exchange rates for FY24  | 1,531  | 359  | 180  | 18  |  2,088  | (144)  |  1,944  | 
| Benchmark EBIT growth  | 155  | 31  | 17  | 6  | 209  | 2  | 211  | 
| Benchmark EBIT at constant exchange rates for FY25  | 1,686  | 390  | 197  | 24  |  2,297  | (142)  |  2,155  | 
| Adjustment to actual exchange rates  | —  | (49)  | 5  | (2)  | (46)  | (2)  | (48)  | 
| Benchmark EBIT for the year ended 31 March 2025  | 1,686  | 341  | 202  | 22  | 2,251  | (144)  | 2,107  | 
| Benchmark EBIT growth at constant exchange rates  | 10%  | 9%  | 10%  | 36%  | 10%  | n/a  | 11%  | 
| Benchmark EBIT growth at actual exchange rates  | 10%  | (5)%  | 12%  | 29%  | 8%  | n/a  | 8%  | 
| Benchmark EBIT margin at constant exchange rates FY24  | 32.9%  | 32.5%  | 21.5%  | 4.1%  | 29.7%  | n/a  | 27.6%  | 
| Benchmark EBIT margin at actual exchange rates FY24  | 32.9%  | 32.5%  | 21.5%  | 3.9%  | 29.6%  | n/a  | 27.6%  | 
| Benchmark EBIT margin at constant exchange rates FY25  | 33.4%  | 32.6%  | 23.1%  | 4.5%  | 30.1%  | n/a  | 28.3%  | 
| Benchmark EBIT margin at actual exchange rates FY25  | 33.4%  | 32.0%  | 23.2%  | 4.2%  | 30.0%  | n/a  | 28.1%  | 
| Total  | Central  | ||||||
| North  | Latin  | UK and  | EMEA and  | operating  | Activities  | Total  | |
| America  | America  | Ireland  | Asia Pacific  | segments  | and other  | Group  | |
| At 31 March 2025  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Goodwill  | 4,170  | 904  | 763  | 817  | 6,654  | —  | 6,654  | 
| Investments in associates  | 4  | —  | 9  | —  | 13  | —  | 13  | 
| Right-of-use assets  | 43  | 14  | 35  | 17  | 109  | 5  | 114  | 
| Other assets  | 2,829  | 900  | 611  | 643  | 4,983  | 1,122  | 6,105  | 
| Total assets  | 7,046  | 1,818  | 1,418  | 1,477  | 11,759  | 1,127  | 12,886  | 
| Lease obligations  | (56)  | (17)  | (42)  | (17)  | (132)  | (4)  | (136)  | 
| Other liabilities  | (1,353)  | (408)  | (307)  | (255)  | (2,323)  | (5,337)  | (7,660)  | 
| Total liabilities  | (1,409)  | (425)  | (349)  | (272)  | (2,455)  | (5,341)  | (7,796)  | 
| Net assets/(liabilities)  | 5,637  | 1,393  | 1,069  | 1,205  | 9,304  | (4,214)  | 5,090  | 
| Total  | Central  | ||||||
| North  | Latin  | UK and  | EMEA and  | operating  | Activities  | Total  | |
| America  | America  | Ireland  | Asia Pacific  | segments  | and other  | Group  | |
| At 31 March 2024  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Goodwill  | 3,841  | 901  | 742  | 478  | 5,962  | —  | 5,962  | 
| Investments in associates  | 4  | —  | 7  | —  | 11  | —  | 11  | 
| Right-of-use assets  | 56  | 14  | 37  | 18  | 125  | 6  | 131  | 
| Other assets  | 2,578  | 898  | 565  | 441  | 4,482  | 1,126  | 5,608  | 
| Total assets  | 6,479  | 1,813  | 1,351  | 937  | 10,580  | 1,132  | 11,712  | 
| Lease obligations  | (71)  | (17)  | (39)  | (19)  | (146)  | (5)  | (151)  | 
| Other liabilities  | (1,301)  | (478)  | (298)  | (207)  | (2,284)  | (4,608)  | (6,892)  | 
| Total liabilities  | (1,372)  | (495)  | (337)  | (226)  | (2,430)  | (4,613)  | (7,043)  | 
| Net assets/(liabilities)  | 5,107  | 1,318  | 1,014  | 711  | 8,150  | (3,481)  | 4,669  | 
| 2025  | 2024  | |||||
| Net assets/  | Net assets/  | |||||
| Assets  | Liabilities  | (liabilities)  | Assets  | Liabilities  | (liabilities)  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| Central Activities  | 602  | (155)  | 447  | 666  | (179)  | 487  | 
| Net debt  1  | 402  | (4,955)  | (4,553)  | 314  | (4,222)  | (3,908)  | 
| Tax  | 123  | (231)  | (108)  | 152  | (212)  | (60)  | 
| 1,127  | (5,341)  | (4,214)  | 1,132  | (4,613)  | (3,481)  | |
| 2025  | 2024  | |
| US$m  | US$m  | |
| North America  | 5,637  | 5,107  | 
| Latin America  | 1,393  | 1,318  | 
| UK and Ireland  | 1,069  | 1,014  | 
| EMEA and Asia Pacific  | 1,205  | 711  | 
| Total operating segments  | 9,304  | 8,150  | 
| Central Activities  | 447  | 487  | 
| Add: lease obligations in operating segments  | 132  | 146  | 
| Less: accrued interest on lease obligations in operating segments  | (1)  | (1)  | 
| Less: right-of-use assets  | (114)  | (131)  | 
| Less: non-controlling interests  | (36)  | (35)  | 
| Capital employed attributable to owners  | 9,732  | 8,616  | 
| Capital expenditure  | Right-of-use asset additions  | Amortisation  | Depreciation  | |||||
| 2025  | 2024  | 2025  | 2024  | 2025  | 2024  | 2025  | 2024  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| North America  | 342  | 340  | 8  | 13  | 218  | 193  | 46  | 52  | 
| Latin America  | 140  | 140  | 8  | 5  | 97  | 100  | 14  | 17  | 
| UK and Ireland  | 66  | 70  | 8  | 33  | 47  | 44  | 19  | 21  | 
| EMEA and Asia Pacific  | 49  | 37  | 6  | 8  | 39  | 31  | 15  | 14  | 
| Total operating segments  | 597  | 587  | 30  | 59  | 401  | 368  | 94  | 104  | 
| Central Activities  | 54  | 53  | 1  | 1  | 49  | 47  | 3  | 2  | 
| Total Group  | 651  | 640  | 31  | 60  | 450  | 415  | 97  | 106  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| USA  | 5,044  | 4,658  | 
| Brazil  | 936  | 991  | 
| UK  | 866  | 839  | 
| Other  | 677  | 609  | 
| 7,523  | 7,097  | 
| 2024  | ||
| 2025  | (Re-presented)  | |
| US$m  | US$m  | |
| USA  | 1,859  | 1,680  | 
| UK  | 432  | 388  | 
| Brazil  | 536  | 504  | 
| Australia  | 300  | 27  | 
| Germany  | 103  | 127  | 
| Other  | 244  | 274  | 
| Segment non-current assets by country  | 3,474  | 3,000  | 
| Goodwill  | 6,654  | 5,962  | 
| Central Activities  | 546  | 617  | 
| Deferred tax  | 71  | 55  | 
| 10,745  | 9,634  | 
| Business-to-  | Consumer  | Total business  | Central  | Total  | |
| Business  | Services  | lines  | Activities  | Group  | |
| Year ended 31 March 2025  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Revenue from external customers  | |||||
| Ongoing activities  | 5,453  | 2,054  | 7,507  | —  | 7,507  | 
| Exited business activities  | 16  | —  | 16  | —  | 16  | 
| Total  | 5,469  | 2,054  | 7,523  | —  | 7,523  | 
| Reconciliation from Benchmark EBIT to profit/(loss) before tax  | |||||
| Benchmark EBIT  | |||||
| Ongoing activities  | 1,689  | 562  | 2,251  | (144)  | 2,107  | 
| Exited business activities  | (25)  | 1  | (24)  | —  | (24)  | 
| Total  | 1,664  | 563  | 2,227  | (144)  | 2,083  | 
| Net interest expense included in Benchmark PBT (note 16(b))  | (1)  | (1)  | (2)  | (155)  | (157)  | 
| Benchmark PBT  | 1,663  | 562  | 2,225  | (299)  | 1,926  | 
| Exceptional items (note 15(a))  | (27)  | (9)  | (36)  | (3)  | (39)  | 
| Amortisation of acquisition intangibles (note 21)  | (183)  | (28)  | (211)  | —  | (211)  | 
| Acquisition and disposal expenses  | (36)  | (1)  | (37)  | —  | (37)  | 
| Adjustment to the fair value of contingent consideration  | 1  | (2)  | (1)  | —  | (1)  | 
| Interest on uncertain tax provisions  | —  | —  | —  | (4)  | (4)  | 
| Financing fair value remeasurements (note 16(c))  | —  | —  | —  | (85)  | (85)  | 
| Profit/(loss) before tax  | 1,418  | 522  | 1,940  | (391)  | 1,549  | 
| Business-to-  | Consumer  | Total business  | Central  | Total  | |
| Business  | Services  | lines  | Activities  | Group  | |
| Year ended 31 March 2024¹  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Revenue from external customers  | |||||
| Ongoing activities  | 5,109  | 1,937  | 7,046  | —  | 7,046  | 
| Exited business activities  | 51  | —  | 51  | —  | 51  | 
| Total  | 5,160  | 1,937  | 7,097  | —  | 7,097  | 
| Reconciliation from Benchmark EBIT to profit/(loss) before tax  | |||||
| Benchmark EBIT  | |||||
| Ongoing activities before transfer pricing and other adjustments  | 1,601  | 486  | 2,087  | (143)  | 1,944  | 
| Transfer pricing and other allocation adjustments  | 8  | (7)  | 1  | (1)  | —  | 
| Ongoing activities  | 1,609  | 479  | 2,088  | (144)  | 1,944  | 
| Exited business activities  | (16)  | —  | (16)  | —  | (16)  | 
| Total  | 1,593  | 479  | 2,072  | (144)  | 1,928  | 
| Net interest expense included in Benchmark PBT (note 16(b))  | (6)  | (2)  | (8)  | (131)  | (139)  | 
| Benchmark PBT  | 1,587  | 477  | 2,064  | (275)  | 1,789  | 
| Exceptional items (note 15(a))  | 4  | —  | 4  | —  | 4  | 
| Amortisation of acquisition intangibles (note 21)  | (163)  | (30)  | (193)  | —  | (193)  | 
| Acquisition and disposal expenses  | (29)  | (12)  | (41)  | —  | (41)  | 
| Adjustment to the fair value of contingent consideration  | —  | (5)  | (5)  | 1  | (4)  | 
| Non-benchmark share of post-tax loss of associates  | —  | (1)  | (1)  | —  | (1)  | 
| Interest on uncertain tax provisions  | —  | —  | —  | 20  | 20  | 
| Financing fair value remeasurements (note 16(c))  | —  | —  | —  | (23)  | (23)  | 
| Profit/(loss) before tax  | 1,399  | 429  | 1,828  | (277)  | 1,551  | 
| Average  | Closing  | ||||
| 2025  | 2024  | 2025  | 2024  | 2023  | |
| US dollar : Brazilian real  | 5.61  | 4.94  | 5.76  | 5.01  | 5.08  | 
| UK pound sterling : US dollar  | 1.28  | 1.26  | 1.29  | 1.26  | 1.24  | 
| Euro : US dollar  | 1.07  | 1.08  | 1.08  | 1.08  | 1.09  | 
| US dollar : Australian dollar  | 1.53  | 1.52  | 1.60  | 1.53  | 1.49  | 
| US dollar : Colombian peso  | 4,142  | 4,113  | 4,199  | 3,852  | 4,623  | 
| 2025  | 2024  | ||
| Notes  | US$m  | US$m  | |
| Wages and salaries  | 1,710  | 1,675  | |
| Social security costs  | 332  | 312  | |
| Share incentive plans  | 33(a)  | 138  | 139  | 
| Pension costs – defined benefit plans  | 35(a)  | 3  | 3  | 
| Pension costs – defined contribution plans  | 75  | 79  | |
| Other employee benefit costs  | 35  | 35  | |
| Employee benefit costs  | 2,293  | 2,243  | |
| Other labour costs  | 287  | 250  | |
| 2,580  | 2,493  | 
| 2025  | 2024  | |
| North America  | 9,207  | 9,110  | 
| Latin America  | 6,071  | 5,874  | 
| UK and Ireland  | 3,790  | 3,853  | 
| EMEA and Asia Pacific  | 3,964  | 3,712  | 
| Total operating segments  | 23,032  | 22,549  | 
| Central Activities  | 265  | 264  | 
| 23,297  | 22,813  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Benchmark:  | ||
| Amortisation of other intangible assets  | 450  | 415  | 
| Depreciation of property, plant and equipment  | 97  | 106  | 
| 547  | 521  | |
| Non-benchmark:  | ||
| Amortisation of acquisition intangibles  | 211  | 193  | 
| 758  | 714  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Audit of the Company and Group financial statements  | 1.2  | 1.2  | 
| Audit of the financial statements of the Company's subsidiaries  | 6.4  | 6.0  | 
| Audit-related assurance services  | 1.3  | 0.7  | 
| Other assurance services  | 0.1  | 0.4  | 
| Total fees payable to the Company's auditor and its associates  | 9.0  | 8.3  | 
| Summary of fees by nature:  | ||
| Fees for audit services  | 7.6  | 7.2  | 
| Fees for audit-related assurance services  | 1.3  | 0.7  | 
| Fees for other assurance services  | 0.1  | 0.4  | 
| 9.0  | 8.3  | 
| 2025  | 2024  | ||
| Notes  | US$m  | US$m  | |
| Exceptional items:  | |||
| Loss/(profit) on disposal of operations  1  | 15(b), 41(d)  | 4  | (5)  | 
| Restructuring costs  | 15(c)  | 50  | —  | 
| Legal provisions movements  1  | 15(d)  | (15)  | 1  | 
| Net charge/(credit) for Exceptional items  | 39  | (4)  | |
| Other adjustments made to derive Benchmark PBT:  | |||
| Amortisation of acquisition intangibles  | 13, 21  | 211  | 193  | 
| Acquisition and disposal expenses  2  | 37  | 41  | |
| Adjustment to the fair value of contingent consideration  1  | 30(h)  | 1  | 4  | 
| Non-benchmark share of post-tax loss of associates  | 23  | —  | 1  | 
| Interest on uncertain tax provisions  | 16(c)  | 4  | (20)  | 
| Financing fair value remeasurements  | 16(c)  | 85  | 23  | 
| Net charge for other adjustments made to derive Benchmark PBT  | 338  | 242  | |
| Net charge for Exceptional items and other adjustments made to derive Benchmark PBT  | 377  | 238  | |
| By income statement caption:  | |||
| Labour costs  | 60  | 14  | |
| Amortisation and depreciation charges  | 211  | 193  | |
| Other operating charges  | 17  | 27  | |
| Within operating profit  | 288  | 234  | |
| Within share of post-tax loss of associates  | —  | 1  | |
| Within finance expense  | 16(a)  | 89  | 3  | 
| Net charge for Exceptional items and other adjustments made to derive Benchmark PBT  | 377  | 238  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Interest income:  | ||
| Bank deposits, short-term investments and loan notes  | (14)  | (11)  | 
| Interest on pension plan assets (note 35(a)(ii))  | (7)  | (7)  | 
| Interest income  | (21)  | (18)  | 
| Finance expense:  | ||
| Eurobonds and notes  | 104  | 93  | 
| Bank loans, commercial paper, overdrafts and other  | 40  | 32  | 
| Commitment and facility fees  | 5  | 5  | 
| Interest on leases  | 7  | 8  | 
| Interest differentials on derivatives  | 22  | 19  | 
| Interest expense  | 178  | 157  | 
| Net non-benchmark finance expense (note 16(c))  | 89  | 3  | 
| Finance expense  | 267  | 160  | 
| Net finance expense included in profit before tax  | 246  | 142  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Interest income  | (21)  | (18)  | 
| Interest expense  | 178  | 157  | 
| Net interest expense included in Benchmark PBT  | 157  | 139  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Fair value losses on borrowings – attributable to interest rate risk  | 14  | 26  | 
| Fair value losses on borrowings – attributable to currency risk  | 43  | 12  | 
| (Gains)/losses on interest rate swaps – fair value hedges  | (9)  | 6  | 
| Gains on cross-currency swaps – fair value hedges  | (39)  | (24)  | 
| Foreign currency gains on cross-currency swaps designated as a cash flow hedge – transfer from OCI  | (12)  | (10)  | 
| (Gains)/losses on items in hedging relationships – hedge ineffectiveness  | (3)  | 10  | 
| Fair value losses/(gains) on non-hedging derivatives  | 34  | (20)  | 
| Foreign exchange losses on Brazilian real intra-Group funding  | 58  | 1  | 
| Other foreign exchange losses on financing activities  | 8  | 5  | 
| Monetary loss on hyperinflation  | —  | 1  | 
| (Decrease)/increase in present value of put options  | (5)  | 31  | 
| Movement in Other financial assets at FVPL  | (6)  | —  | 
| Movement in connection with commitments to purchase own shares  | (1)  | (5)  | 
| Net charge for financing fair value remeasurements  | 85  | 23  | 
| Interest on uncertain tax provisions  | 4  | (20)  | 
| 89  | 3  | 
| 2025  | 2024  | |
| Gain/(loss)  | US$m  | US$m  | 
| Impact on profit for the financial year:  | ||
| Effect of an increase of 1.8% (2024: 1.7%) on US dollar-denominated Net debt:  | ||
| Due to the revaluation of borrowings and related derivatives, higher interest expense on borrowings and higher interest  | ||
| income on cash and cash equivalents  | 43  | 72  | 
| Effect of an increase of 1.8% (2024: 1.6%) on UK pound sterling-denominated Net debt:  | ||
| Due to the revaluation of borrowings and related derivatives, higher interest expense on borrowings and higher interest  | ||
| income on cash and cash equivalents  | 4  | (4)  | 
| Effect of an increase of 3.5% (2024: 4.2%) on Brazilian real-denominated Net debt:  | ||
| Due to higher interest income on cash and cash equivalents  | 5  | 4  | 
| Effect of an increase of 1.6% (2024: 1.4%) on euro-denominated Net debt:  | ||
| Due to the revaluation of borrowings and related derivatives, higher interest expense on borrowings and higher interest  | ||
| income on cash and cash equivalents  | (10)  | —  | 
| Impact on other components of equity:  | ||
| Effect of an increase of 1.8% (2024: 1.7%):  | ||
| On the fair value of the US dollar leg of cross-currency swaps treated as a cash flow hedge  | 4  | 9  | 
| Effect of an increase of 1.8% (2024: 1.6%):  | ||
| On the fair value of the UK pound sterling leg of cross-currency swaps treated as a cash flow hedge  | (4)  | (9)  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Current tax:  | ||
| Tax on income for the year  | 503  | 513  | 
| Global minimum top-up tax  | 7  | —  | 
| Adjustments in respect of earlier years  | (10)  | (72)  | 
| Total current tax charge  | 500  | 441  | 
| Deferred tax:  | ||
| Origination and reversal of temporary differences  | (111)  | (101)  | 
| Adjustments in respect of earlier years  | (10)  | 8  | 
| Total deferred tax credit  | (121)  | (93)  | 
| Tax charge  | 379  | 348  | 
| The tax charge comprises:  | ||
| UK tax  | 18  | 22  | 
| Non-UK tax  | 361  | 326  | 
| 379  | 348  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Profit before tax  | 1,549  | 1,551  | 
| Profit before tax multiplied by the main rate of UK corporation tax of 25% (2024: 25%)  | 387  | 388  | 
| Effects of:  | ||
| Adjustments in respect of earlier years  1  | (20)  | (64)  | 
| Income not taxable  | (11)  | (14)  | 
| Losses not recognised  | 9  | 10  | 
| Expenses not deductible  | 62  | 59  | 
| Different effective tax rates in non-UK businesses  | (64)  | (59)  | 
| Local taxes  2  | 61  | 61  | 
| Current year movement in uncertain tax positions  | 20  | 14  | 
| Recognition of previously unrecognised tax losses  3  | (27)  | (11)  | 
| Research and development incentive claims  | (38)  | (36)  | 
| Tax charge  | 379  | 348  | 
| Effective rate of tax based on profit before tax  | 24.5%  | 22.4%  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Tax charge  | 379  | 348  | 
| Tax relief on Exceptional items and other adjustments made to derive Benchmark PBT  | 108  | 111  | 
| Benchmark tax charge  | 487  | 459  | 
| Benchmark PBT  | 1,926  | 1,789  | 
| Benchmark tax rate  | 25.3%  | 25.7%  | 
| Basic  | Diluted  | |||
| 2025  | 2024  | 2025  | 2024  | |
| US cents  | US cents  | US cents  | US cents  | |
| EPS  | 127.6  | 131.3  | 126.5  | 130.2  | 
| Add: Exceptional items and other adjustments made to derive Benchmark PBT,  | ||||
| net of related tax  | 29.3  | 14.2  | 29.0  | 14.0  | 
| Benchmark EPS (non-GAAP measure)  | 156.9  | 145.5  | 155.5  | 144.2  | 
| Adjustment to constant exchange rates  | 3.9  | (0.2)  | 3.9  | (0.1)  | 
| Benchmark EPS at constant exchange rates (non-GAAP measure)  | 160.8  | 145.3  | 159.4  | 144.1  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Profit for the financial year attributable to owners of Experian plc  | 1,166  | 1,199  | 
| Add: Exceptional items and other adjustments made to derive Benchmark PBT, net of related tax  | 268  | 129  | 
| Benchmark earnings attributable to owners of Experian plc (non-GAAP measure)  | 1,434  | 1,328  | 
| Adjustment to constant exchange rates  | 36  | (1)  | 
| Benchmark earnings attributable to owners of Experian plc at constant FX (non-GAAP measure)  | 1,470  | 1,327  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Profit for the financial year attributable to non-controlling interests  | 4  | 4  | 
| Add/(deduct): Exceptional items and other adjustments made to derive Benchmark PBT, net of related tax  | 1  | (2)  | 
| Benchmark earnings attributable to non-controlling interests (non-GAAP measure)  | 5  | 2  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Total Benchmark earnings (non-GAAP measure)  | 1,439  | 1,330  | 
| Exceptional items and other adjustments made to derive Benchmark PBT, net of related tax:  | ||
| – attributable to owners of Experian plc  | (268)  | (129)  | 
| – attributable to non-controlling interests  | (1)  | 2  | 
| Profit for the financial year  | 1,170  | 1,203  | 
| 2025  | 2024  | |
| million  | million  | |
| Weighted average number of ordinary shares  | 914  | 913  | 
| Add: dilutive effect of share incentive awards, options and share purchases  | 8  | 8  | 
| Diluted weighted average number of ordinary shares  | 922  | 921  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Cost  | ||
| At 1 April  | 6,208  | 5,821  | 
| Differences on exchange  | (121)  | 19  | 
| Additions through business combinations (note 41(a))  | 815  | 368  | 
| At 31 March  | 6,902  | 6,208  | 
| Accumulated impairment  | ||
| At 1 April  | 246  | 246  | 
| Differences on exchange  | 2  | —  | 
| At 31 March  | 248  | 246  | 
| Net book amount at 1 April  | 5,962  | 5,575  | 
| Net book amount at 31 March  | 6,654  | 5,962  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| North America  | 4,170  | 3,841  | 
| Latin America  | 904  | 901  | 
| UK and Ireland  | 763  | 742  | 
| EMEA and Asia Pacific  | 817  | 478  | 
| At 31 March  | 6,654  | 5,962  | 
| 2025  | 2024  | |||
| Long-term  | Long-term  | |||
| Discount rate  | growth rate  | Discount rate  | growth rate  | |
| % p.a.  | % p.a.  | % p.a.  | % p.a.  | |
| North America  | 9.7  | 3.5  | 10.6  | 3.6  | 
| Latin America  | 17.6  | 5.2  | 19.1  | 5.1  | 
| UK and Ireland  | 10.7  | 2.8  | 11.7  | 3.1  | 
| EMEA and Asia Pacific  | 12.2  | 4.1  | 13.8  | 4.1  | 
| Acquisition intangibles  | |||||||
| Customer  | Acquired  | Marketing-  | Internally  | ||||
| and other  | software  | related  | Internal use  | generated  | |||
| relationships  | development  | assets  | Databases  | software  | software  | Total  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| Cost  | |||||||
| At 1 April 2024  | 1,645  | 544  | 98  | 1,655  | 395  | 1,773  | 6,110  | 
| Differences on exchange  | (41)  | (13)  | (5)  | (90)  | (13)  | (13)  | (175)  | 
| Additions through business combinations (note 41)  | 318  | 200  | 7  | 11  | 1  | 26  | 563  | 
| Other additions  | —  | —  | —  | 203  | 60  | 340  | 603  | 
| Other disposals  | (159)  | (84)  | (40)  | (111)  | (39)  | (78)  | (511)  | 
| At 31 March 2025  | 1,763  | 647  | 60  | 1,668  | 404  | 2,048  | 6,590  | 
| Accumulated amortisation and impairment  | |||||||
| At 1 April 2024  | 907  | 357  | 84  | 1,159  | 296  | 870  | 3,673  | 
| Differences on exchange  | (12)  | (6)  | (3)  | (69)  | (10)  | (1)  | (101)  | 
| Charge for the year  | 145  | 63  | 3  | 178  | 33  | 239  | 661  | 
| Impairment charge  | —  | —  | —  | 4  | —  | 9  | 13  | 
| Other disposals  | (159)  | (84)  | (40)  | (111)  | (39)  | (78)  | (511)  | 
| At 31 March 2025  | 881  | 330  | 44  | 1,161  | 280  | 1,039  | 3,735  | 
| Net book amount at 31 March 2025  | 882  | 317  | 16  | 507  | 124  | 1,009  | 2,855  | 
| Acquisition intangibles  | |||||||
| Customer  | Acquired  | Marketing-  | Internally  | ||||
| and other  | software  | related  | Internal use  | generated  | |||
| relationships  | development  | assets  | Databases  | software  | software  | Total  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| Cost  | |||||||
| At 1 April 2023  | 1,643  | 489  | 101  | 1,504  | 355  | 1,433  | 5,525  | 
| Differences on exchange  | 3  | (3)  | 2  | 7  | (4)  | 22  | 27  | 
| Additions through business combinations  | 68  | 76  | 3  | 3  | 3  | 6  | 159  | 
| Other additions  | —  | —  | —  | 201  | 50  | 349  | 600  | 
| Disposal of businesses  | (6)  | —  | —  | —  | —  | —  | (6)  | 
| Other disposals  | (63)  | (18)  | (8)  | (60)  | (9)  | (37)  | (195)  | 
| At 31 March 2024  | 1,645  | 544  | 98  | 1,655  | 395  | 1,773  | 6,110  | 
| Accumulated amortisation and impairment  | |||||||
| At 1 April 2023  | 834  | 318  | 88  | 1,036  | 272  | 688  | 3,236  | 
| Differences on exchange  | 8  | 2  | —  | 7  | 3  | 10  | 30  | 
| Charge for the year  | 134  | 55  | 4  | 176  | 30  | 209  | 608  | 
| Disposal of businesses  | (6)  | —  | —  | —  | —  | —  | (6)  | 
| Other disposals  | (63)  | (18)  | (8)  | (60)  | (9)  | (37)  | (195)  | 
| At 31 March 2024  | 907  | 357  | 84  | 1,159  | 296  | 870  | 3,673  | 
| Net book amount at 1 April 2023  | 809  | 171  | 13  | 468  | 83  | 745  | 2,289  | 
| Net book amount at 31 March 2024  | 738  | 187  | 14  | 496  | 99  | 903  | 2,437  | 
| Right-of-use assets  | |||||||
| Freehold  | Leasehold  | Plant and  | Land and  | Motor  | Plant and  | ||
| properties  | improvements  | equipment  | buildings  | vehicles  | equipment  | Total  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| Cost  | |||||||
| At 1 April 2024  | 84  | 154  | 652  | 210  | 31  | 33  | 1,164  | 
| Differences on exchange  | —  | (3)  | (5)  | (2)  | —  | —  | (10)  | 
| Additions through business combinations  | —  | 1  | 1  | 3  | —  | —  | 5  | 
| Other additions  | —  | 7  | 41  | 15  | 12  | 4  | 79  | 
| Disposals  | (1)  | (21)  | (111)  | (30)  | (10)  | (21)  | (194)  | 
| At 31 March 2025  | 83  | 138  | 578  | 196  | 33  | 16  | 1,044  | 
| Accumulated depreciation and impairment  | |||||||
| At 1 April 2024  | 22  | 87  | 533  | 105  | 15  | 23  | 785  | 
| Differences on exchange  | —  | —  | (3)  | (1)  | (1)  | 1  | (4)  | 
| Charge for the year  | 2  | 5  | 47  | 29  | 9  | 5  | 97  | 
| Impairment charge  | 2  | —  | —  | —  | —  | —  | 2  | 
| Disposals  | (1)  | (21)  | (110)  | (26)  | (8)  | (20)  | (186)  | 
| At 31 March 2025  | 25  | 71  | 467  | 107  | 15  | 9  | 694  | 
| Net book amount at 31 March 2025  | 58  | 67  | 111  | 89  | 18  | 7  | 350  | 
| Right-of-use assets  | |||||||
| Freehold  | Leasehold  | Plant and  | Land and  | Motor  | Plant and  | ||
| properties  | improvements  | equipment  | buildings  | vehicles  | equipment  | Total  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| Cost  | |||||||
| At 1 April 2023  | 73  | 150  | 644  | 201  | 26  | 36  | 1,130  | 
| Differences on exchange  | 2  | 1  | 4  | 1  | —  | —  | 8  | 
| Additions through business combinations  | —  | —  | 1  | —  | —  | —  | 1  | 
| Other additions  | —  | 3  | 37  | 40  | 11  | 9  | 100  | 
| Transfer from assets held-for-sale  | 9  | —  | —  | —  | —  | —  | 9  | 
| Disposal of business  | —  | —  | (1)  | —  | —  | —  | (1)  | 
| Other disposals  | —  | —  | (33)  | (32)  | (6)  | (12)  | (83)  | 
| At 31 March 2024  | 84  | 154  | 652  | 210  | 31  | 33  | 1,164  | 
| Accumulated depreciation and impairment  | |||||||
| At 1 April 2023  | 20  | 81  | 512  | 99  | 12  | 24  | 748  | 
| Differences on exchange  | —  | 1  | 4  | —  | —  | —  | 5  | 
| Charge for the year  | 2  | 5  | 50  | 32  | 8  | 9  | 106  | 
| Disposal of business  | —  | —  | (1)  | —  | —  | —  | (1)  | 
| Other disposals  | —  | —  | (32)  | (26)  | (5)  | (10)  | (73)  | 
| At 31 March 2024  | 22  | 87  | 533  | 105  | 15  | 23  | 785  | 
| Net book amount at 1 April 2023  | 53  | 69  | 132  | 102  | 14  | 12  | 382  | 
| Net book amount at 31 March 2024  | 62  | 67  | 119  | 105  | 16  | 10  | 379  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| At 1 April  | 11  | 12  | 
| Share of profit after tax  | 2  | —  | 
| Impairment charge  | —  | (1)  | 
| At 31 March  | 13  | 11  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Trade and unbilled receivables  | 1,508  | 1,419  | 
| Credit note provision  | (41)  | (51)  | 
| Trade receivables – after credit note provision  | 1,467  | 1,368  | 
| Contract assets  | 153  | 146  | 
| Trade receivables and contract assets  | 1,620  | 1,514  | 
| Loss allowance  | (46)  | (27)  | 
| Net trade receivables and contract assets  | 1,574  | 1,487  | 
| VAT and equivalent taxes recoverable  | 11  | 8  | 
| Prepayments  | 239  | 267  | 
| Contract costs  | 86  | 94  | 
| 1,910  | 1,856  | |
| As reported in the Group balance sheet:  | ||
| Current trade and other receivables  | 1,684  | 1,660  | 
| Non-current trade and other receivables  | 226  | 196  | 
| 1,910  | 1,856  | 
| 2025  | 2024  | |||
| Gross carrying  | Gross carrying  | |||
| Loss allowance  | amount  | Loss allowance  | amount  | |
| US$m  | US$m  | US$m  | US$m  | |
| Not past-due  | (6)  | 1,246  | (6)  | 1,116  | 
| Up to three months past-due  | (1)  | 201  | (1)  | 262  | 
| Three to six months past-due  | (2)  | 40  | (1)  | 44  | 
| Over six months past-due  | (37)  | 133  | (19)  | 92  | 
| Trade receivables and contract assets  | (46)  | 1,620  | (27)  | 1,514  | 
| Loss allowance (note 24(c))  | (46)  | (27)  | ||
| Net trade receivables and contract assets  | 1,574  | 1,487  | ||
| 2025  | 2024  | |
| US$m  | US$m  | |
| At 1 April  | 27  | 26  | 
| Increase in the loss allowance recognised in the Group income statement  | 31  | 9  | 
| Receivables written off in the year as uncollectable  | (12)  | (9)  | 
| Differences on exchange  | —  | 1  | 
| At 31 March  | 46  | 27  | 
| Contract assets  | Trade receivables  | |||
| 2025  | 2024  | 2025  | 2024  | |
| US$m  | US$m  | US$m  | US$m  | |
| US dollar  | 76  | 80  | 822  | 762  | 
| Brazilian real  | 3  | 4  | 276  | 283  | 
| UK pound sterling  | 38  | 26  | 195  | 169  | 
| Euro  | 15  | 17  | 50  | 54  | 
| Other  | 21  | 19  | 78  | 73  | 
| 153  | 146  | 1,421  | 1,341  | |
| 2025  | 2024  | |
| US$m  | US$m  | |
| Cash at bank and in hand  | 129  | 171  | 
| Short-term investments  1  | 239  | 141  | 
| 368  | 312  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Counterparty holding of more than US$2m:  | ||
| A rated  | 223  | 219  | 
| B rated  | 133  | 81  | 
| Counterparty holding of more than US$2m  | 356  | 300  | 
| Counterparty holding of less than US$2m  | 12  | 12  | 
| 368  | 312  | 
| 2025  | 2024  | |||
| Current  | Non-current  | Current  | Non-current  | |
| US$m  | US$m  | US$m  | US$m  | |
| Trade payables  | 358  | —  | 341  | —  | 
| VAT and other equivalent taxes payable  | 36  | —  | 37  | —  | 
| Social security costs  | 145  | —  | 147  | —  | 
| Accruals  | 949  | 8  | 845  | 7  | 
| Contract liabilities  | 392  | 61  | 437  | 83  | 
| Other payables  | 247  | 103  | 229  | 100  | 
| 2,127  | 172  | 2,036  | 190  | |
| 2025  | 2024  | |
| US$m  | US$m  | |
| Financial instruments  | 963  | 869  | 
| VAT and other equivalent taxes payable  | 36  | 37  | 
| Social security costs  | 145  | 147  | 
| Amounts within accruals and contract liabilities  | 1,155  | 1,173  | 
| Items other than financial instruments  | 1,336  | 1,357  | 
| 2,299  | 2,226  | 
| Carrying amount  | Fair value  | |||
| 2025  | 2024  | 2025  | 2024  | |
| US$m  | US$m  | US$m  | US$m  | |
| Current:  | ||||
| Bonds:  | ||||
| £400m 2.125% Euronotes 2024  | —  | 505  | —  | 498  | 
| £400m 0.739% Euronotes 2025  | 519  | —  | 505  | —  | 
| Commercial paper  | 214  | 218  | 214  | 218  | 
| Bank overdrafts  | 2  | 12  | 2  | 12  | 
| Lease obligations (note 29)  | 39  | 37  | 39  | 37  | 
| 774  | 772  | 760  | 765  | |
| Non-current:  | ||||
| Bonds:  | ||||
| £400m 0.739% Euronotes 2025  | —  | 506  | —  | 473  | 
| €500m 1.375% Euronotes 2026  | 538  | 520  | 533  | 515  | 
| US$500m 4.25% Notes 2029  | 502  | 501  | 495  | 484  | 
| US$750m 2.75% Notes 2030  | 718  | 708  | 686  | 656  | 
| €500m 1.56% Euronotes 2031  | 545  | 544  | 495  | 480  | 
| £400m 3.25% Euronotes 2032  | 530  | 517  | 460  | 463  | 
| €500m 3.51% Euronotes 2033  | 536  | —  | 535  | —  | 
| €650m 3.375% Euronotes 2034  | 692  | —  | 683  | —  | 
| Bank loans  | 84  | 84  | 84  | 84  | 
| Lease obligations (note 29)  | 97  | 114  | 97  | 114  | 
| 4,242  | 3,494  | 4,068  | 3,269  | |
| Total borrowings  | 5,016  | 4,266  | 4,828  | 4,034  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Less than one year  | 774  | 772  | 
| One to two years  | 652  | 540  | 
| Two to three years  | 24  | 628  | 
| Three to four years  | 515  | 19  | 
| Four to five years  | 726  | 511  | 
| Over five years  | 2,325  | 1,796  | 
| 5,016  | 4,266  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| US dollar  | 4,001  | 3,305  | 
| Euro  | 547  | 575  | 
| UK pound sterling  | 297  | 362  | 
| Australian dollar  | 126  | 1  | 
| Other  | 45  | 23  | 
| 5,016  | 4,266  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Facilities expiring in:  | ||
| One to two years  | 316  | 100  | 
| Two to three years  | —  | 216  | 
| Three to four years  | 2,050  | 150  | 
| Four to five years  | —  | 1,900  | 
| 2,366  | 2,366  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Cash and cash equivalents (net of overdrafts)  | 366  | 300  | 
| Debt due within one year – bonds and notes  | (518)  | (499)  | 
| Debt due within one year – commercial paper  | (214)  | (218)  | 
| Debt due within one year – lease obligations  | (38)  | (36)  | 
| Debt due after more than one year – bonds and notes  | (4,031)  | (3,279)  | 
| Debt due after more than one year – bank loans  | (84)  | (84)  | 
| Debt due after more than one year – lease obligations  | (97)  | (114)  | 
| Derivatives hedging loans and borrowings  | (68)  | (123)  | 
| Net debt  | (4,684)  | (4,053)  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Cash and cash equivalents  | 368  | 312  | 
| Current borrowings  | (774)  | (772)  | 
| Non-current borrowings  | (4,242)  | (3,494)  | 
| Borrowings  | (5,016)  | (4,266)  | 
| Total of Group balance sheet line items  | (4,648)  | (3,954)  | 
| Accrued interest reported within borrowings excluded from Net debt  | 32  | 24  | 
| Derivatives reported within Other financial assets  | 34  | 2  | 
| Derivatives reported within Other financial liabilities  | (102)  | (125)  | 
| Net debt  | (4,684)  | (4,053)  | 
| Derivatives  | Liabilities  | ||||||
| hedging  | from  | Cash  | |||||
| loans and  | Current  | Non-current  | financing  | Accrued  | and cash  | ||
| borrowings  | borrowings  | borrowings  | activities  | interest  | equivalents  | Net debt  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| At 1 April 2024  | (123)  | (772)  | (3,494)  | (4,389)  | 24  | 312  | (4,053)  | 
| Cash flow  | (34)  | 41  | —  | 7  | —  | 400  | 407  | 
| Borrowings cash flow  | —  | 625  | (1,321)  | (696)  | —  | —  | (696)  | 
| Reclassification of borrowings  | —  | (637)  | 637  | —  | —  | —  | —  | 
| Net interest paid  | —  | —  | —  | —  | —  | (165)  | (165)  | 
| Movement on accrued interest  | —  | 4  | (12)  | (8)  | 8  | —  | —  | 
| Net cash flow  | (34)  | 33  | (696)  | (697)  | 8  | 235  | (454)  | 
| Non-cash lease obligation additions and disposals  1  | —  | (6)  | (18)  | (24)  | —  | —  | (24)  | 
| Principal lease payments  | —  | —  | —  | —  | —  | 41  | 41  | 
| Net share purchases  | —  | —  | —  | —  | —  | (179)  | (179)  | 
| Additions through business combinations  | —  | (1)  | (2)  | (3)  | —  | —  | (3)  | 
| Fair value gains/(losses)  | 49  | (5)  | (8)  | 36  | —  | —  | 36  | 
| Exchange and other movements  | 40  | (23)  | (24)  | (7)  | —  | (41)  | (48)  | 
| At 31 March 2025  | (68)  | (774)  | (4,242)  | (5,084)  | 32  | 368  | (4,684)  | 
| Derivatives  | Liabilities  | ||||||
| hedging  | from  | Cash  | |||||
| loans and  | Current  | Non-current  | financing  | Accrued  | and cash  | ||
| borrowings  | borrowings  | borrowings  | activities  | interest  | equivalents  | Net debt  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| At 1 April 2023  | (154)  | (156)  | (3,943)  | (4,253)  | 21  | 202  | (4,030)  | 
| Cash flow  | (10)  | 48  | —  | 38  | —  | 303  | 341  | 
| Borrowings cash flow  | —  | (102)  | —  | (102)  | —  | —  | (102)  | 
| Reclassification of borrowings  | —  | (537)  | 537  | —  | —  | —  | —  | 
| Net interest paid  | —  | —  | —  | —  | —  | (149)  | (149)  | 
| Movement on accrued interest  | —  | (6)  | 3  | (3)  | 3  | —  | —  | 
| Net cash flow  | (10)  | (597)  | 540  | (67)  | 3  | 154  | 90  | 
| Non-cash lease obligation additions and disposals  1  | —  | (5)  | (45)  | (50)  | —  | —  | (50)  | 
| Principal lease payments  | —  | —  | —  | —  | —  | 48  | 48  | 
| Net share purchases  | —  | —  | —  | —  | —  | (100)  | (100)  | 
| Additions through business combinations  | —  | (7)  | —  | (7)  | —  | —  | (7)  | 
| Fair value (losses)/gains  | 14  | —  | (17)  | (3)  | —  | —  | (3)  | 
| Exchange and other movements  | 27  | (7)  | (29)  | (9)  | —  | 8  | (1)  | 
| At 31 March 2024  | (123)  | (772)  | (3,494)  | (4,389)  | 24  | 312  | (4,053)  | 
| 2025  | 2024  | ||
| Notes  | US$m  | US$m  | |
| Right-of-use assets:  | |||
| Land and buildings  | 22  | 89  | 105  | 
| Motor vehicles  | 22  | 18  | 16  | 
| Plant and equipment  | 22  | 7  | 10  | 
| At 31 March  | 114  | 131  | |
| Lease obligations:  | |||
| Current  | 27  | 39  | 37  | 
| Non-current  | 27  | 97  | 114  | 
| At 31 March  | 136  | 151  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Less than one year  | 44  | 44  | 
| One to two years  | 34  | 38  | 
| Two to three years  | 27  | 27  | 
| Three to four years  | 15  | 21  | 
| Four to five years  | 9  | 12  | 
| Over five years  | 26  | 32  | 
| Total undiscounted lease obligations at 31 March  | 155  | 174  | 
| 2025  | 2024  | ||
| Notes  | US$m  | US$m  | |
| Depreciation charge for right-of-use assets:  | |||
| Land and buildings  | 22  | 29  | 32  | 
| Motor vehicles  | 22  | 9  | 8  | 
| Plant and equipment  | 22  | 5  | 9  | 
| Total depreciation charge for right-of-use assets  | 43  | 49  | |
| Interest expense  | 16  | 7  | 8  | 
| Expense relating to the lease of low-value assets  | 2  | 4  | |
| Total  | 52  | 61  | 
| 2025  | 2024  | |||||
| Current  | Non-current  | Total  | Current  | Non-current  | Total  | |
| Assets  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Cash flow hedge of borrowings (cross-currency swaps)  1  | 1  | —  | 1  | —  | —  | —  | 
| Listed investments  2  | —  | 54  | 54  | —  | 67  | 67  | 
| Trade investments  | —  | 167  | 167  | —  | 167  | 167  | 
| 1  | 221  | 222  | —  | 234  | 234  | |
| 2025  | 2024  | |||||
| Current  | Non-current  | Total  | Current  | Non-current  | Total  | |
| Liabilities  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Cash flow hedge of borrowings (cross-currency swaps)  1  | —  | —  | —  | —  | 10  | 10  | 
| 2025  | 2024  | |||||
| Current  | Non-current  | Total  | Current  | Non-current  | Total  | |
| Assets  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Financial assets held at amortised cost  | 17  | —  | 17  | —  | —  | —  | 
| Derivative financial instruments:  | ||||||
| Fair value hedge of borrowings (cross-currency swaps)  1  | —  | 26  | 26  | —  | —  | —  | 
| Non-hedging derivatives (interest rate swaps)  | 2  | 118  | 120  | 3  | 158  | 161  | 
| Non-hedging derivatives (foreign exchange contracts)  | 10  | —  | 10  | 2  | —  | 2  | 
| Non-hedging derivatives (equity swaps)  | 2  | 1  | 3  | 4  | 2  | 6  | 
| Derivative financial instruments  | 14  | 145  | 159  | 9  | 160  | 169  | 
| Other financial assets at fair value through profit or loss  2  | 5  | 8  | 13  | —  | 14  | 14  | 
| Assets at fair value through profit or loss  | 19  | 153  | 172  | 9  | 174  | 183  | 
| Other financial assets  | 36  | 153  | 189  | 9  | 174  | 183  | 
| 2025  | 2024  | |||||
| Current  | Non-current  | Total  | Current  | Non-current  | Total  | |
| Liabilities  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Derivative financial instruments:  | ||||||
| Fair value hedge of borrowings (cross-currency swaps)  | —  | 59  | 59  | 20  | 45  | 65  | 
| Fair value hedge of borrowings (interest rate swaps)  | —  | 31  | 31  | —  | 40  | 40  | 
| Derivatives used for hedging  1  | —  | 90  | 90  | 20  | 85  | 105  | 
| Non-hedging derivatives (interest rate swaps)  | —  | 11  | 11  | —  | 18  | 18  | 
| Non-hedging derivatives (foreign exchange contracts)  | 4  | —  | 4  | 3  | —  | 3  | 
| Derivative financial instruments  3  | 4  | 101  | 105  | 23  | 103  | 126  | 
| Put options  | —  | 84  | 84  | 21  | 112  | 133  | 
| Other financial liabilities  | 4  | 185  | 189  | 44  | 215  | 259  | 
| 2025  | 2024  | |||||||
| Assets  | Liabilities  | Assets  | Liabilities  | |||||
| Fair value  | Notional  | Fair value  | Notional  | Fair value  | Notional  | Fair value  | Notional  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| Cross-currency swaps  | 27  | 1,029  | 59  | 1,222  | —  | —  | 75  | 1,414  | 
| Interest rate swaps  | 120  | 1,350  | 42  | 550  | 161  | 1,550  | 58  | 550  | 
| Foreign exchange contracts  | 10  | 402  | 4  | 608  | 2  | 256  | 3  | 461  | 
| Equity swaps  | 3  | 33  | —  | —  | 6  | 30  | —  | —  | 
| 160  | 2,814  | 105  | 2,380  | 169  | 1,836  | 136  | 2,425  | |
| Assets  | Liabilities  | |||
| 2025  | 2024  | 2025  | 2024  | |
| US$m  | US$m  | US$m  | US$m  | |
| Reported in the Group balance sheet  | 160  | 169  | 105  | 136  | 
| Related amounts not offset in the Group balance sheet  | (86)  | (90)  | (86)  | (90)  | 
| Net amount  | 74  | 79  | 19  | 46  | 
| Maturity  | ||||||
| Less than  | One to  | Two to  | Three to  | Four to  | Over  | |
| At 31 March 2025  | one year  | two years  | three years  | four years  | five years  | five years  | 
| Fair value hedges  | ||||||
| Interest rate risk  | ||||||
| Interest rate swaps:  | ||||||
| Notional amount (US$m)  | —  | —  | —  | —  | 300  | —  | 
| Weighted average fixed interest rate  | —  | —  | —  | —  | 1.66%  | —  | 
| Cross-currency swaps:  | ||||||
| Notional amount (US$m)  | —  | 504  | —  | —  | —  | 1,232  | 
| Weighted average fixed interest rate  | —  | 1.38%  | —  | —  | —  | 3.43%  | 
| Foreign currency risk  | ||||||
| Cross-currency swaps:  | ||||||
| Notional amount (US$m)  | —  | 504  | —  | —  | —  | 1,232  | 
| EUR:USD forward contract rate  | —  | 1.12  | —  | —  | —  | 1.07  | 
| Cash flow hedge  | ||||||
| Foreign currency risk  | ||||||
| Cross-currency swaps:  | ||||||
| Notional amount (US$m)  | 515  | —  | —  | —  | —  | —  | 
| GBP:USD forward contract rate  | 1.29  | —  | —  | —  | —  | —  | 
| Maturity  | ||||||
| Less than  | One to  | Two to  | Three to  | Four to  | Over  | |
| At 31 March 2024  | one year  | two years  | three years  | four years  | five years  | five years  | 
| Fair value hedges  | ||||||
| Interest rate risk  | ||||||
| Interest rate swaps:  | ||||||
| Notional amount (US$m)  | —  | —  | —  | —  | —  | 300  | 
| Weighted average fixed interest rate  | —  | —  | —  | —  | —  | 1.66%  | 
| Cross-currency swaps:  | ||||||
| Notional amount (US$m)  |  395  | —  |  504  | —  | —  | —  | 
| Weighted average fixed interest rate  | 2.13%  | —  | 1.38%  | —  | —  | —  | 
| Foreign currency risk  | ||||||
| Cross-currency swaps:  | ||||||
| Notional amount (US$m)  | 395  | —  | 504  | —  | —  | —  | 
| EUR:USD forward contract rate  | —  | —  | 1.12  | —  | —  | —  | 
| GBP:USD forward contract rate  | 1.32  | —  | —  | —  | —  | —  | 
| Cash flow hedge  | ||||||
| Foreign currency risk  | ||||||
| Cross-currency swaps:  | ||||||
| Notional amount (US$m)  | —  | 515  | —  | —  | —  | —  | 
| GBP:USD forward contract rate  | —  | 1.29  | —  | —  | —  | —  | 
| 2025  | ||||
| Changes in fair value  | ||||
| used for calculating  | ||||
| Notional amount of  | Carrying amount of hedging instrument  | hedge ineffectiveness  | ||
| hedging instrument  | Assets  | Liabilities  | (Note 16(c))  | |
| US$m  | US$m  | US$m  | US$m  | |
| Fair value hedges  | ||||
| Interest rate risk  | ||||
| Cross-currency swaps  | 1,736  | 26  | (59)  | (3)  | 
| Interest rate swaps  | 300  | —  | (31)  | (9)  | 
| Foreign exchange risk  | ||||
| Cross-currency swaps  | 1,736  | 26  | (59)  | (36)  | 
| Cash flow hedge  | ||||
| Foreign exchange risk  | ||||
| Cross-currency swaps  | 515  | 1  | —  | (11)  | 
| 2024  | ||||
| Changes in fair value  | ||||
| used for calculating  | ||||
| Notional amount of  | Carrying amount of hedging instrument  | hedge ineffectiveness  | ||
| hedging instrument  | Assets  | Liabilities  | (Note 16(c))  | |
| US$m  | US$m  | US$m  | US$m  | |
| Fair value hedges  | ||||
| Interest rate risk  | ||||
| Cross-currency swaps  | 899  | —  | (65)  | (22)  | 
| Interest rate swaps  | 300  | —  | (40)  | 6  | 
| Foreign exchange risk  | ||||
| Cross-currency swaps  | 899  | —  | (65)  | (2)  | 
| Cash flow hedge  | ||||
| Foreign exchange risk  | ||||
| Cross-currency swaps  | 515  | —  | (10)  | (14)  | 
| 2025  | 2024  | |||||
| Accumulated  | ||||||
| amount of fair  | Accumulated  | |||||
| value hedge  | amount of fair  | |||||
| adjustments  | value hedge  | |||||
| included in  | adjustments  | |||||
| the carrying  | included in  | |||||
| Carrying amount  | amount of the  | Changes in fair value  | the carrying  | Changes in fair value  | ||
| of hedged item  | hedged item  | used for calculating  | Carrying amount of  | amount of the  | used for calculating  | |
| hedge ineffectiveness  | hedged item  | hedged item  | hedge ineffectiveness  | |||
| Liabilities  | (Note 16(c))  | Liabilities  | (Note 16(c))  | |||
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| Fair value hedges  | ||||||
| Interest rate risk  | ||||||
| Borrowings  | (1,983)  | (52)  | 14  | (1,103)  | (67)  | 26  | 
| Foreign exchange risk  | ||||||
| Borrowings  | (1,712)  | (13)  | 31  | (842)  | (34)  | 2  | 
| Cash flow hedge  | ||||||
| Foreign exchange risk  | ||||||
| Borrowings  | (519)  | n/a  | 11  | (506)  | n/a  | 14  | 
| 2025  | 2024  | |
| Fair value hedges (Note 16(c))  | US$m  | US$m  | 
| Interest rate risk  | 2  | 10  | 
| Foreign exchange risk  | (5)  | —  | 
| (Gains)/losses on items in hedging relationships – hedge ineffectiveness  | (3)  | 10  | 
| 2025  | 2024  | |||||||
| Level 1  | Level 2  | Level 3  | Total  | Level 1  | Level 2  | Level 3  | Total  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| Financial assets:  | ||||||||
| Derivatives used for hedging – fair value hedges  | —  | 26  | —  | 26  | —  | —  | —  | —  | 
| Non-hedging derivatives  | —  | 133  | —  | 133  | —  | 169  | —  | 169  | 
| Other financial assets at fair value through profit or loss  | —  | —  | 13  | 13  | —  | —  | 14  | 14  | 
| Financial assets at fair value through profit or loss (note 30(b))  | —  | 159  | 13  | 172  | —  | 169  | 14  | 183  | 
| Derivatives used for hedging – cash flow hedge  1  | —  | 1  | —  | 1  | —  | —  | —  | —  | 
| Listed and trade investments  | 54  | —  | 167  | 221  | 67  | —  | 167  | 234  | 
| Financial assets revalued through OCI (note 30(a))  | 54  | 1  | 167  | 222  | 67  | —  | 167  | 234  | 
| 54  | 160  | 180  | 394  | 67  | 169  | 181  | 417  | |
| Financial liabilities:  | ||||||||
| Derivatives used for hedging – fair value hedges  | —  | (90)  | —  | (90)  | —  | (105)  | —  | (105)  | 
| Non-hedging derivatives  | —  | (15)  | —  | (15)  | —  | (21)  | —  | (21)  | 
| Other liabilities at fair value through profit or loss  | —  | —  | (140)  | (140)  | —  | —  | (92)  | (92)  | 
| Financial liabilities at fair value through profit or loss (note 30(b))  | —  | (105)  | (140)  | (245)  | —  | (126)  | (92)  | (218)  | 
| Derivatives used for hedging – cash flow hedge  1  | —  | —  | —  | —  | —  | (10)  | —  | (10)  | 
| Put options  | —  | —  | (84)  | (84)  | —  | —  | (133)  | (133)  | 
| —  | (105)  | (224)  | (329)  | —  | (136)  | (225)  | (361)  | |
| Net financial assets/(liabilities)  | 54  | 55  | (44)  | 65  | 67  | 33  | (44)  | 56  | 
| Year ended 31 March 2025  | Year ended 31 March 2024  | |||||||||
| Financial  | Financial  | |||||||||
| assets  | Other  | assets  | Other  | |||||||
| revalued  | financial  | revalued  | financial  | |||||||
| through  | assets  | Contingent  | Put  | through  | assets  | Contingent  | Put  | |||
| OCI  | at FVPL  | consideration  | options  | Total  | OCI  | at FVPL  | consideration  | options  | Total  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| At 1 April  | 167  | 14  | (92)  | (133)  | (44)  | 252  | 16  | (139)  | (33)  | 96  | 
| Additions  1,2  | 46  | 6  | (56)  | —  | (4)  | 9  | 2  | (56)  | (71)  | (116)  | 
| Disposals  | (5)  | (11)  | —  | —  | (16)  | (1)  | —  | —  | —  | (1)  | 
| Conversion of convertible debt to equity  | ||||||||||
| investments  | 3  | (3)  | —  | —  | —  | 5  | (5)  | —  | —  | —  | 
| Settlement of contingent consideration  | ||||||||||
| (note 41(b)(ii))  | —  | —  | 8  | —  | 8  | —  | —  | 112  | —  | 112  | 
| Adjustment to the fair value of  | ||||||||||
| contingent consideration  3  | —  | —  | (1)  | —  | (1)  | —  | —  | (4)  | —  | (4)  | 
| Valuation gains/(losses) recognised in  | ||||||||||
| the Group income statement  4  | —  | 6  | —  | 5  | 11  | —  | —  | —  | (31)  | (31)  | 
| Settlement of put options  5  | —  | —  | —  | 22  | 22  | —  | —  | —  | —  | —  | 
| Transfer of put option liability to  | ||||||||||
| contingent consideration  5  | —  | —  | (9)  | 9  | —  | —  | —  | —  | —  | —  | 
| Valuation losses recognised in OCI  6  | (44)  | —  | —  | —  | (44)  | (98)  | —  | —  | —  | (98)  | 
| Currency translation gains/(losses)  | ||||||||||
| recognised directly in OCI  | —  | —  | 10  | 13  | 23  | —  | —  | (2)  | 2  | —  | 
| Other  | —  | 1  | —  | —  | 1  | —  | 1  | (3)  | —  | (2)  | 
| At 31 March  | 167  | 13  | (140)  | (84)  | (44)  | 167  | 14  | (92)  | (133)  | (44)  | 
| Less than  | One to  | Two to  | Three to  | Four to  | Over  | ||
| one year  | two years  | three years  | four years  | five years  | five years  | Total  | |
| At 31 March 2025  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Borrowings  | 898  | 776  | 137  | 625  | 848  | 2,588  | 5,872  | 
| Net settled derivative financial instruments – interest rate swaps  | 15  | 15  | 15  | 15  | 9  | —  | 69  | 
| Gross settled derivative financial instruments:  | |||||||
| Outflows for derivative contracts  | 359  | 555  | 44  | 44  | 44  | 928  | 1,974  | 
| Inflows for derivative contracts  | (315)  | (517)  | (24)  | (24)  | (24)  | (821)  | (1,725)  | 
| Gross settled derivative financial instruments  | 44  | 38  | 20  | 20  | 20  | 107  | 249  | 
| Options in respect of non-controlling interests  | —  | —  | 27  | —  | 108  | —  | 135  | 
| Trade and other payables  | 853  | 56  | 71  | 5  | 2  | 4  | 991  | 
| Cash outflows  | 1,810  | 885  | 270  | 665  | 987  | 2,699  | 7,316  | 
| Less than  | One to  | Two to  | Three to  | Four to  | Over  | ||
| one year  | two years  | three years  | four years  | five years  | five years  | Total  | |
| At 31 March 2024  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | 
| Borrowings  | 868  | 621  | 725  | 88  | 579  | 1,939  | 4,820  | 
| Net settled derivative financial instruments – interest rate swaps  | 20  | 19  | 19  | 20  | 20  | 12  | 110  | 
| Gross settled derivative financial instruments:  | |||||||
| Outflows for derivative contracts  | 911  | 555  | 512  | —  | —  | —  | 1,978  | 
| Inflows for derivative contracts  | (856)  | (516)  | (492)  | —  | —  | —  | (1,864)  | 
| Gross settled derivative financial instruments  | 55  | 39  | 20  | —  | —  | —  | 114  | 
| Options in respect of non-controlling interests  | —  | 22  | 27  | —  | —  | 156  | 205  | 
| Trade and other payables  | 762  | 104  | 5  | 7  | —  | —  | 878  | 
| Cash outflows  | 1,705  | 805  | 796  | 115  | 599  | 2,107  | 6,127  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Share awards  | 114  | 122  | 
| Share options  | 13  | 10  | 
| Expense recognised (all equity-settled)  | 127  | 132  | 
| Charge for associated social security obligations  | 11  | 7  | 
| Total expense recognised in the Group income statement  | 138  | 139  | 
| Year ended  | 31 March 2025  | 31 March 2024  | 31 March 2023  | |||
| CIP  | PSP  | CIP  | PSP  | CIP  | PSP  | |
| Profit condition:  | ||||||
| Proportion of awards subject  | ||||||
| to condition  | 50%  | 50%  | 50%  | 50%  | 50%  | 50%  | 
| Minimum payout requirement  | 5% per annum  | 5% per annum  | 5% per annum  | 5% per annum  | 6% per annum  | 6% per annum  | 
| Target payout requirement  | 7% per annum  | 7% per annum  | 7% per annum  | 7% per annum  | 8% per annum  | 8% per annum  | 
| Maximum payout requirement  | 9% per annum  | 9% per annum  | 9% per annum  | 9% per annum  | 10% per annum  | 10% per annum  | 
| Assumed outcome at grant date  | 50%  | 50%  | 50%  | 50%  | 75%  | 75%  | 
| Cash flow condition:  | ||||||
| Proportion of awards subject  | ||||||
| to condition  | 50%  | 50%  | 50%  | |||
| Minimum payout requirement  | US$5.9bn  | US$5.5bn  | US$5.0bn  | |||
| Target payout requirement  | US$6.15bn  | US$5.75bn  | US$5.2bn  | |||
| Maximum payout requirement  | US$6.4bn  | US$6.0bn  | US$5.4bn  | |||
| Assumed outcome at grant date  | 57%  | 53%  | 77%  | |||
| ROCE condition:  | ||||||
| Proportion of awards subject  | ||||||
| to condition  | 25%  | 25%  | 25%  | |||
| Minimum payout requirement  | 14.5% per annum  | 14.5% per annum  | 14.5% per annum  | |||
| Target payout requirement  | 15.4% per annum  | 15.4% per annum  | 15.4% per annum  | |||
| Maximum payout requirement  | 16.0% per annum  | 16.0% per annum  | 16.0% per annum  | |||
| Assumed outcome at grant date  | 100%  | 75%  | 64%  | |||
| TSR condition:  | ||||||
| Proportion of awards subject  | ||||||
| to condition  | 25%  | 25%  | 25%  | |||
| Assumed outcome at grant date  | 48%  | 62%  | 62%  | |||
| 2025  | 2024  | |
| million  | million  | |
| At 1 April  | 12.4  | 12.2  | 
| Grants  | 3.4  | 4.1  | 
| Forfeitures  | (1.7)  | (0.7)  | 
| Lapse of awards  | (0.1)  | (0.2)  | 
| Vesting  | (3.7)  | (3.0)  | 
| At 31 March  | 10.3  | 12.4  | 
| Analysis by plan:  | ||
| CIP  | 2.9  | 3.7  | 
| PSP – conditional awards  | 2.2  | 2.9  | 
| PSP – unconditional awards  | 5.2  | 5.8  | 
| At 31 March  | 10.3  | 12.4  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Retirement benefit assets/(obligations) – funded defined benefit plans:  | ||
| Fair value of funded plans' assets  | 828  | 871  | 
| Present value of funded plans' obligations  | (626)  | (685)  | 
| Assets in the Group balance sheet for funded defined benefit pensions  | 202  | 186  | 
| Obligations for unfunded post-employment benefits:  | ||
| Present value of defined benefit pensions – unfunded plans  | (35)  | (37)  | 
| Present value of post-employment medical benefits  | (2)  | (2)  | 
| Liabilities in the Group balance sheet  | (37)  | (39)  | 
| Net post-employment benefit assets  | 165  | 147  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| By nature of expense:  | ||
| Administration expenses  | 3  | 3  | 
| Charge within labour costs and operating profit  | 3  | 3  | 
| Interest income (note 16(a))  | (7)  | (7)  | 
| Total net credit to the Group income statement  | (4)  | (4)  | 
| Present value of obligations  | ||||||
| Defined  | Defined  | Post-  | ||||
| benefit  | benefit  | employment  | ||||
| Fair value of  | pensions  | pensions  | medical  | Movements in  | ||
| plan assets  | – funded  | – unfunded  | benefits  | Total  | net position  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| At 1 April 2024  | 871  | (685)  | (37)  | (2)  | (724)  | 147  | 
| Income statement credit/(charge):  | ||||||
| Administration expenses  | (3)  | —  | —  | —  | —  | (3)  | 
| Interest income/(expense)  | 42  | (33)  | (2)  | —  | (35)  | 7  | 
| Total credit/(charge) to the Group income statement  | 39  | (33)  | (2)  | —  | (35)  | 4  | 
| Remeasurements:  | ||||||
| Return on plan assets other than interest  | (64)  | —  | —  | —  | —  | (64)  | 
| Gains from change in demographic assumptions  | —  | 2  | —  | —  | 2  | 2  | 
| Gains from change in financial assumptions  | —  | 68  | 2  | —  | 70  | 70  | 
| Experience losses  | —  | (2)  | —  | —  | (2)  | (2)  | 
| Remeasurement of post-employment benefit assets  | ||||||
| and obligations  | (64)  | 68  | 2  | —  | 70  | 6  | 
| Differences on exchange  | 21  | (15)  | (1)  | —  | (16)  | 5  | 
| Contributions paid by the Group  | 3  | —  | —  | —  | —  | 3  | 
| Benefits paid  | (42)  | 39  | 3  | —  | 42  | —  | 
| At 31 March 2025  | 828  | (626)  | (35)  | (2)  | (663)  | 165  | 
| Present value of obligations  | ||||||
| Defined  | Defined  | Post-  | ||||
| benefit  | benefit  | employment  | ||||
| Fair value of  | pensions  | pensions  | medical  | Movements in  | ||
| plan assets  | – funded  | – unfunded  | benefits  | Total  | net position  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| At 1 April 2023  | 866  | (692)  | (36)  | (3)  | (731)  | 135  | 
| Income statement credit/(charge):  | ||||||
| Administration expenses  | (3)  | —  | —  | —  | —  | (3)  | 
| Interest income/(expense)  | 42  | (33)  | (2)  | —  | (35)  | 7  | 
| Total credit/(charge) to the Group income statement  | 39  | (33)  | (2)  | —  | (35)  | 4  | 
| Remeasurements:  | ||||||
| Return on plan assets other than interest  | (11)  | —  | —  | —  | —  | (11)  | 
| Gains from change in demographic assumptions  | —  | 12  | —  | —  | 12  | 12  | 
| Gains from change in financial assumptions  | —  | 4  | 1  | —  | 5  | 5  | 
| Experience losses  | —  | (3)  | (1)  | —  | (4)  | (4)  | 
| Remeasurement of post-employment benefit assets  | ||||||
| and obligations  | (11)  | 13  | —  | —  | 13  | 2  | 
| Differences on exchange  | 17  | (13)  | (1)  | —  | (14)  | 3  | 
| Contributions paid by the Group  | 3  | —  | —  | —  | —  | 3  | 
| Benefits paid  | (43)  | 40  | 2  | 1  | 43  | —  | 
| At 31 March 2024  | 871  | (685)  | (37)  | (2)  | (724)  | 147  | 
| 2025  | 2024  | |
| % p.a.  | % p.a.  | |
| Discount rate  | 5.8  | 4.9  | 
| Inflation rate – based on the UK Retail Prices Index (the RPI)  | 3.2  | 3.3  | 
| Inflation rate – based on the UK Consumer Prices Index (the CPI)  | 2.8  | 2.8  | 
| Increase for pensions in payment – element based on the RPI (where cap is 5%)  | 3.0  | 3.1  | 
| Increase for pensions in payment – element based on the CPI (where cap is 2.5%)  | 1.9  | 1.9  | 
| Increase for pensions in payment – element based on the CPI (where cap is 3%)  | 2.2  | 2.2  | 
| Increase for pensions in deferment  | 2.8  | 2.8  | 
| Inflation in medical costs  | 6.5  | 6.3  | 
| 2025  | 2024  | |
| years  | years  | |
| For a male currently aged 65  | 22.1  | 22.2  | 
| For a female currently aged 65  | 24.2  | 24.2  | 
| For a male currently aged 50  | 23.1  | 23.1  | 
| For a female currently aged 50  | 25.3  | 25.3  | 
| 2025  | 2024  | |||
| US$m  | %  | US$m  | %  | |
| Equities  | 116  | 14  | 105  | 12  | 
| Index-linked gilts/Liability Driven Investments  | 227  | 28  | 262  | 30  | 
| Global corporate bonds  | 276  | 33  | 290  | 33  | 
| Secured credit  | 146  | 18  | 142  | 17  | 
| Senior private debt  | 20  | 2  | 37  | 4  | 
| Other  | 43  | 5  | 35  | 4  | 
| 828  | 100  | 871  | 100  | |
| 2025  | 2024  | |
| US$m  | US$m  | |
| Deferred tax assets  | 71  | 55  | 
| Deferred tax liabilities  | (155)  | (129)  | 
| Net deferred tax liability  | (84)  | (74)  | 
| Other  | |||||||||
| intangible  | Retirement  | ||||||||
| assets  | Share  | benefit  | Accounting  | ||||||
| (excluding  | Tax losses  | incentive  | Accelerated  | assets/  | provisions  | Deferred  | |||
| goodwill)  | Goodwill  | and credits  | plans  | depreciation  | (obligations)  | and accruals  | interest  | Total  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| At 1 April 2024  | (109)  | (394)  | 72  | 60  | 151  | (32)  | 154  | 24  | (74)  | 
| Differences on exchange  | 1  | 21  | (2)  | (1)  | —  | —  | (6)  | —  | 13  | 
| Credit/(charge) recognised in the Group  | |||||||||
| income statement  | 55  | (8)  | 16  | 4  | 42  | (1)  | 14  | (1)  | 121  | 
| Additions through business  | |||||||||
| combinations  | (146)  | —  | —  | —  | —  | —  | 3  | —  | (143)  | 
| Charge recognised within OCI  | —  | —  | —  | —  | —  | (7)  | (2)  | —  | (9)  | 
| Credit recognised directly in equity on  | |||||||||
| transactions with owners  | —  | —  | —  | 5  | —  | —  | —  | —  | 5  | 
| Transfers  | —  | —  | —  | —  | —  | —  | 3  | —  | 3  | 
| At 31 March 2025  | (199)  | (381)  | 86  | 68  | 193  | (40)  | 166  | 23  | (84)  | 
| Other  | |||||||||
| intangible  | Retirement  | ||||||||
| assets  | Share  | benefit  | Accounting  | ||||||
| (excluding  | Tax losses  | incentive  | Accelerated  | assets/  | provisions  | Deferred  | |||
| goodwill)  | Goodwill  | and credits  | plans  | depreciation  | (obligations)  | and accruals  | interest  | Total  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| At 1 April 2023  | (158)  | (377)  | 65  | 47  | 83  | (32)  | 162  | 24  | (186)  | 
| Differences on exchange  | 3  | —  | 2  | —  | —  | —  | —  | —  | 5  | 
| Credit/(charge) recognised in the Group  | |||||||||
| income statement  | 44  | (22)  | (3)  | 4  | 68  | (5)  | 7  | —  | 93  | 
| Additions through business  | |||||||||
| combinations  | (6)  | —  | 4  | —  | —  | —  | —  | —  | (2)  | 
| Credit recognised within OCI  | —  | —  | —  | —  | —  | 5  | 2  | —  | 7  | 
| Credit recognised directly in equity on  | |||||||||
| transactions with owners  | —  | —  | —  | 9  | —  | —  | —  | —  | 9  | 
| Transfers  | 8  | 5  | 4  | —  | —  | —  | (17)  | —  | —  | 
| At 31 March 2024  | (109)  | (394)  | 72  | 60  | 151  | (32)  | 154  | 24  | (74)  | 
| 2025  | 2024  | ||
| Notes  | US$m  | US$m  | |
| At 1 April  | 14  | (85)  | |
| Differences on exchange  | (2)  | 4  | |
| Tax charge in the Group income statement  | 17(a)  | (500)  | (441)  | 
| Tax recognised directly in equity on transactions with owners  | 9  | 1  | |
| Other tax paid  | 447  | 544  | |
| Transfers  | 8  | (9)  | |
| At 31 March  | (24)  | 14  | |
| Presented in the Group balance sheet as:  | |||
| Current tax assets  | 52  | 97  | |
| Current tax liabilities  | (76)  | (83)  | |
| (24)  | 14  | 
| 2025  | 2024  | |||||||
| North  | North  | |||||||
| America  | Other  | America  | Other  | |||||
| legal claims  | Restructuring  | liabilities  | Total  | legal claims  | Restructuring  | liabilities  | Total  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| At 1 April  | 4  | 7  | 20  | 31  | 25  | 13  | 21  | 59  | 
| Differences on exchange  | —  | —  | (1)  | (1)  | —  | —  | 1  | 1  | 
| Amounts charged in the year  | —  | —  | —  | —  | 1  | —  | 4  | 5  | 
| Utilised  | —  | (4)  | (2)  | (6)  | (22)  | (6)  | (6)  | (34)  | 
| At 31 March  | 4  | 3  | 17  | 24  | 4  | 7  | 20  | 31  | 
| Presented in the Group balance sheet as:  | ||||||||
| Current provisions  | 4  | 3  | 14  | 21  | 4  | 7  | 17  | 28  | 
| Non-current provisions  | —  | —  | 3  | 3  | —  | —  | 3  | 3  | 
| 4  | 3  | 17  | 24  | 4  | 7  | 20  | 31  | |
| Merger  | Hedging  | Translation  | Own shares  | Total other  | |
| reserve  | reserve  | reserve  | reserve  | reserves  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | |
| At 1 April 2024  | (15,682)  | 11  | (1,423)  | (1,343)  | (18,437)  | 
| Purchase of shares by employee trusts  | —  | —  | —  | (83)  | (83)  | 
| Purchase of shares held as treasury shares  | —  | —  | —  | (117)  | (117)  | 
| Other vesting of awards and exercises of share options  | —  | —  | —  | 88  | 88  | 
| Change in the fair value of hedging instruments recognised in OCI  | —  | 11  | —  | —  | 11  | 
| Amounts reclassified from OCI to the Group income statement  | —  | (12)  | —  | —  | (12)  | 
| Currency translation losses  | —  | —  | (129)  | —  | (129)  | 
| At 31 March 2025  | (15,682)  | 10  | (1,552)  | (1,455)  | (18,679)  | 
| Merger  | Hedging  | Translation  | Own shares  | Total other  | |
| reserve  | reserve  | reserve  | reserve  | reserves  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | |
| At 1 April 2023  | (15,682)  | 7  | (1,465)  | (1,273)  | (18,413)  | 
| Purchase of shares by employee trusts  | —  | —  | —  | (56)  | (56)  | 
| Purchase of shares held as treasury shares  | —  | —  | —  | (69)  | (69)  | 
| Other vesting of awards and exercises of share options  | —  | —  | —  | 55  | 55  | 
| Change in the fair value of hedging instruments recognised in OCI  | —  | 14  | —  | —  | 14  | 
| Amounts reclassified from OCI to the Group income statement  | —  | (10)  | —  | —  | (10)  | 
| Currency translation gains  | —  | —  | 42  | —  | 42  | 
| At 31 March 2024  | (15,682)  | 11  | (1,423)  | (1,343)  | (18,437)  | 
| Number of own shares held  | Cost of own shares held  | |||||
| Treasury  | Trusts  | Total  | Treasury  | Trusts  | Total  | |
| million  | million  | million  | US$m  | US$m  | US$m  | |
| At 1 April 2024  | 53  | 6  | 59  | 1,076  | 267  | 1,343  | 
| Purchase of shares by employee trusts  | —  | 1  | 1  | —  | 83  | 83  | 
| Purchase of shares held as treasury shares  1  | 3  | —  | 3  | 117  | —  | 117  | 
| Other vesting of awards and exercises of share options  | (1)  | (3)  | (4)  | (16)  | (72)  | (88)  | 
| At 31 March 2025  | 55  | 4  | 59  | 1,177  | 278  | 1,455  | 
| Number of own shares held  | Cost of own shares held  | |||||
| Treasury  | Trusts  | Total  | Treasury  | Trusts  | Total  | |
| million  | million  | million  | US$m  | US$m  | US$m  | |
| At 1 April 2023  | 52  | 7  | 59  | 1,023  | 250  | 1,273  | 
| Purchase of shares by employee trusts  | —  | 2  | 2  | —  | 56  | 56  | 
| Purchase of shares held as treasury shares  | 2  | —  | 2  | 69  | —  | 69  | 
| Other vesting of awards and exercises of share options  | (1)  | (3)  | (4)  | (16)  | (39)  | (55)  | 
| At 31 March 2024  | 53  | 6  | 59  | 1,076  | 267  | 1,343  | 
| 2025  | 2024  | ||
| Notes  | US$m  | US$m  | |
| Profit before tax  | 1,549  | 1,551  | |
| Share of post-tax (profit)/loss of associates  | (2)  | 1  | |
| Net finance expense  | 246  | 142  | |
| Operating profit  | 1,793  | 1,694  | |
| Profit on disposal of property, plant and equipment  | —  | (1)  | |
| Loss/(profit) on disposal of operations  | 15(b)  | 4  | (5)  | 
| Impairment of other intangible assets  | 21  | 13  | —  | 
| Impairment of property, plant and equipment  | 2  | —  | |
| Impairment of held-for-sale assets  | —  | 1  | |
| Amortisation and depreciation  1  | 13  | 758  | 714  | 
| Charge in respect of share incentive plans  | 33(a)  | 127  | 132  | 
| Increase in working capital  | 40(b)  | (54)  | (32)  | 
| Acquisition expenses – difference between income statement charge and amounts paid  | (2)  | 1  | |
| Acquisition employee incentives – difference between income statement charge and amounts paid  | (24)  | (10)  | |
| Adjustment to the fair value of contingent consideration  | 1  | 4  | |
| Movement in Exceptional and other non-benchmark items included in working capital  | (1)  | (58)  | |
| Cash generated from operations  | 2,617  | 2,440  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Trade and other receivables  | (63)  | (155)  | 
| Trade and other payables  | 9  | 123  | 
| Increase in working capital  | (54)  | (32)  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Databases  | 203  | 201  | 
| Internally generated software  | 340  | 349  | 
| Internal use software  | 60  | 50  | 
| Purchase of other intangible assets  | 603  | 600  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Purchase of subsidiaries (note 41(a))  | 1,198  | 366  | 
| Less: net cash acquired with subsidiaries (note 41(a))  | (48)  | (17)  | 
| Settlement of deferred and contingent consideration  | 8  | 113  | 
| As reported in the Group cash flow statement  | 1,158  | 462  | 
| Acquisition expenses paid  | 39  | 33  | 
| Acquisition employee incentives paid  | 24  | 17  | 
| Transactions in respect of non-controlling interests  | 1  | —  | 
| Acquisition of additional interest in subsidiary undertaking  | 22  | —  | 
| Cash outflow for acquisitions (non-GAAP measure)  | 1,244  | 512  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Issue of ordinary shares  | (20)  | (20)  | 
| Purchase of shares by employee trusts  | 83  | 56  | 
| Purchase of shares held as treasury shares  | 116  | 64  | 
| Cash outflow in respect of net share purchases (non-GAAP measure)  | 179  | 100  | 
| As reported in the Group cash flow statement:  | ||
| Cash inflow in respect of shares issued  | (20)  | (20)  | 
| Cash outflow in respect of share purchases  | 199  | 120  | 
| Cash outflow in respect of net share purchases (non-GAAP measure)  | 179  | 100  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Cash and cash equivalents in the Group balance sheet  | 368  | 312  | 
| Bank overdrafts  | (2)  | (12)  | 
| Cash and cash equivalents in the Group cash flow statement  | 366  | 300  | 
| 2025  | 2024  | ||
| Notes  | US$m  | US$m  | |
| Cash generated from operations  | 40(a)  | 2,617  | 2,440  | 
| Purchase of other intangible assets  | 40(c)  | (603)  | (600)  | 
| Purchase of property, plant and equipment  | (48)  | (40)  | |
| Disposal of property, plant and equipment  | 1  | 1  | |
| Disposal of assets classified as held-for-sale  | —  | 2  | |
| Principal lease payments  | (41)  | (48)  | |
| Acquisition expenses paid  | 40(d)  | 39  | 33  | 
| Acquisition employee incentives paid  | 40(d)  | 24  | 17  | 
| Cash flows in respect of Exceptional and other non-benchmark items  | 36  | 59  | |
| Benchmark operating cash flow (non-GAAP measure)  | 2,025  | 1,864  | 
| illion  | Audigent  | NeuroID  | Other  1  | Total  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | |
| Intangible assets:  | |||||
| Customer and other relationships  | 228  | 62  | 8  | 20  | 318  | 
| Software development  | 36  | 103  | 30  | 31  | 200  | 
| Marketing-related assets  | 3  | 3  | 1  | —  | 7  | 
| Other intangibles  | 27  | 8  | —  | 3  | 38  | 
| Intangible assets  | 294  | 176  | 39  | 54  | 563  | 
| Property, plant and equipment  | 3  | 1  | —  | 1  | 5  | 
| Deferred tax assets  | 4  | —  | —  | (7)  | (3)  | 
| Trade and other receivables  | 13  | 16  | 2  | 2  | 33  | 
| Cash and cash equivalents (note 40(d))  | 21  | 12  | 12  | 3  | 48  | 
| Trade and other payables  | (25)  | (13)  | (9)  | (12)  | (59)  | 
| Borrowings  | (2)  | (1)  | —  | —  | (3)  | 
| Deferred tax liabilities  | (72)  | (44)  | (10)  | (14)  | (140)  | 
| Total identifiable net assets  | 236  | 147  | 34  | 27  | 444  | 
| Goodwill  | 349  | 216  | 111  | 139  | 815  | 
| Total  | 585  | 363  | 145  | 166  | 1,259  | 
| Satisfied by:  | |||||
| Cash and cash equivalents (note 40(d))  | 585  | 358  | 145  | 110  | 1,198  | 
| Trade investment  | —  | 5  | —  | —  | 5  | 
| Contingent consideration  | —  | —  | —  | 56  | 56  | 
| Total  | 585  | 363  | 145  | 166  | 1,259  | 
| illion  | Audigent  | NeuroID  | Other  | Total  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | |
| Increase/(decrease) in book value of net assets due to provisional fair  | |||||
| value adjustments:  | |||||
| Intangible assets  | 267  | 168  | 39  | 51  | 525  | 
| Deferred tax assets  | (19)  | —  | —  | (7)  | (26)  | 
| Trade and other payables  | (2)  | —  | (1)  | (8)  | (11)  | 
| Deferred tax liabilities  | (72)  | (44)  | (10)  | (14)  | (140)  | 
| Increase in book value of net assets due to provisional fair value  | |||||
| adjustments  | 174  | 124  | 28  | 22  | 348  | 
| Gross contractual amounts receivable in respect of trade and other  | |||||
| receivables  | 13  | 16  | 2  | 3  | 34  | 
| Pro forma revenue from 1 April 2024 to date of acquisition  | 58  | 102  | 4  | 21  | 185  | 
| Revenue from date of acquisition to 31 March 2025  | 54  | 18  | 5  | 11  | 88  | 
| Loss before tax from date of acquisition to 31 March 2025  | (5)  | (8)  | (12)  | (3)  | (28)  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Capital expenditure for which contracts have been placed:  | ||
| Other intangible assets  | 38  | 48  | 
| Property, plant and equipment  | 9  | 7  | 
| 47  | 55  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Salaries and short-term employee benefits  | 10  | 12  | 
| Share incentive plans  | 6  | 14  | 
| 16  | 26  | 
| 2025  | 2024  | ||
| Notes  | US$m  | US$m  | |
| Other operating income  | F  | 96.9  | 108.5  | 
| Staff costs  | G  | (4.8)  | (4.4)  | 
| Depreciation  | M  | (0.7)  | (0.7)  | 
| Other operating charges  | F  | (124.2)  | (142.5)  | 
| Operating loss  | (32.8)  | (39.1)  | |
| Dividend income from subsidiary undertakings  | H  | 75.0  | 1,500.0  | 
| Interest receivable and similar income  | I  | 5.7  | 7.6  | 
| Interest payable and similar expenses  | J  | (0.2)  | (0.3)  | 
| Profit before tax  | 47.7  | 1,468.2  | |
| Tax on profit  | K  | (4.7)  | 3.3  | 
| Profit after tax and for the financial year  | 43.0  | 1,471.5  | 
| 2025  | 2024  | ||
| Notes  | US$m  | US$m  | |
| Fixed assets  | |||
| Tangible assets  | M(i)  | 4.0  | 4.7  | 
| Investments – shares in Group undertakings  | N  | 22,087.0  | 21,960.1  | 
| Deferred tax assets  | K  | 2.9  | 2.9  | 
| 22,093.9  | 21,967.7  | ||
| Current assets  | |||
| Debtors – amounts falling due within one year  | O  | 82.4  | 254.2  | 
| Cash at bank and in hand  | 0.1  | 0.6  | |
| Current liabilities  | |||
| Creditors – amounts falling due within one year  | P  | (27.0)  | (19.8)  | 
| Net current assets  | 55.5  | 235.0  | |
| Total assets less current liabilities  | 22,149.4  | 22,202.7  | |
| Creditors – amounts falling due after more than one year  | P  | (13.4)  | (16.3)  | 
| Net assets  | 22,136.0  | 22,186.4  | |
| Equity  | |||
| Called-up share capital  | Q  | 73.4  | 73.3  | 
| Share premium account  | Q  | 1,510.4  | 1,490.2  | 
| Profit and loss account reserve  | R  | 20,552.2  | 20,622.9  | 
| Total shareholders’ funds  | 22,136.0  | 22,186.4  | 
| Called-up  | Share  | |||||
| share  | premium  | Profit and loss account reserve  | ||||
| capital  | account  | Profit and  | Own shares  | Total  | Total  | |
| (Note Q)  | (Note Q)  | loss account  | reserve  | (Note R)  | equity  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| At 1 April 2024  | 73.3  | 1,490.2  | 21,934.5  | (1,311.6)  | 20,622.9  | 22,186.4  | 
| Profit and Total comprehensive income for the financial year  | —  | —  | 43.0  | —  | 43.0  | 43.0  | 
| Transactions with owners:  | ||||||
| Employee share incentive plans:  | ||||||
| – value of employee services  | —  | —  | 126.9  | —  | 126.9  | 126.9  | 
| – shares issued on vesting  | 0.1  | 20.2  | —  | —  | —  | 20.3  | 
| – purchase of shares by employee trusts  | —  | —  | —  | (82.6)  | (82.6)  | (82.6)  | 
| – other vesting of awards and exercises of share options  | —  | —  | (88.0)  | 88.0  | —  | —  | 
| Purchase of shares held as treasury shares  | —  | —  | —  | (117.6)  | (117.6)  | (117.6)  | 
| Shares delivered to a subsidiary in connection with an  | ||||||
| acquisition  | —  | —  | —  | 5.9  | 5.9  | 5.9  | 
| Dividends paid  | —  | —  | (46.3)  | —  | (46.3)  | (46.3)  | 
| Transactions with owners  | 0.1  | 20.2  | (7.4)  | (106.3)  | (113.7)  | (93.4)  | 
| At 31 March 2025  | 73.4  | 1,510.4  | 21,970.1  | (1,417.9)  | 20,552.2  | 22,136.0  | 
| Called-up  | Share  | |||||
| share  | premium  | Profit and loss account reserve  | ||||
| capital  | account  | Profit and  | Own shares  | Total  | Total  | |
| (Note Q)  | (Note Q)  | loss account  | reserve  | (Note R)  | equity  | |
| US$m  | US$m  | US$m  | US$m  | US$m  | US$m  | |
| At 1 April 2023  | 73.2  | 1,469.1  | 20,431.9  | (1,241.2)  | 19,190.7  | 20,733.0  | 
| Profit and Total comprehensive income for the financial year  | —  | —  | 1,471.5  | —  | 1,471.5  | 1,471.5  | 
| Transactions with owners:  | ||||||
| Employee share incentive plans:  | ||||||
| – value of employee services  | —  | —  | 132.3  | —  | 132.3  | 132.3  | 
| – shares issued on vesting  | 0.1  | 21.1  | —  | —  | —  | 21.2  | 
| – purchase of shares by employee trusts  | —  | —  | —  | (56.0)  | (56.0)  | (56.0)  | 
| – other vesting of awards and exercises of share options  | —  | —  | (54.9)  | 54.9  | —  | —  | 
| Purchase of shares held as treasury shares  | —  | —  | —  | (69.3)  | (69.3)  | (69.3)  | 
| Dividends paid  | —  | —  | (46.3)  | —  | (46.3)  | (46.3)  | 
| Transactions with owners  | 0.1  | 21.1  | 31.1  | (70.4)  | (39.3)  | (18.1)  | 
| At 31 March 2024  | 73.3  | 1,490.2  | 21,934.5  | (1,311.6)  | 20,622.9  | 22,186.4  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Directors' fees  | 2.9  | 2.9  | 
| Wages and salaries  | 1.7  | 1.3  | 
| Social security costs  | 0.1  | 0.1  | 
| Other pension costs  | 0.1  | 0.1  | 
| 4.8  | 4.4  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Interest income:  | ||
| Interest receivable on amounts owed by subsidiary undertakings  | 5.1  | 2.5  | 
| Foreign exchange gains  | 0.6  | 5.1  | 
| 5.7  | 7.6  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Interest payable on lease obligation  | 0.2  | 0.3  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Current tax:  | ||
| Irish corporation tax charge/(credit) on profit for the financial year  | 5.2  | (4.4)  | 
| Adjustments in respect of earlier years  | (0.5)  | 1.2  | 
| Total current tax charge/(credit)  | 4.7  | (3.2)  | 
| Deferred tax:  | ||
| Adjustments in respect of earlier years  | —  | (0.1)  | 
| Total deferred tax credit  | —  | (0.1)  | 
| Tax charge/(credit) for the year  | 4.7  | (3.3)  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Profit before tax  | 47.7  | 1,468.2  | 
| Profit before tax multiplied by the applicable rate of tax  | 11.9  | 367.1  | 
| Effects of:  | ||
| Income not taxable  1  | (18.9)  | (376.9)  | 
| Expenses not deductible  | 3.4  | 1.0  | 
| Global minimum top-up tax  2  | 7.0  | —  | 
| Adjustments in respect of earlier years  | (0.5)  | 1.1  | 
| Losses recognised at a lower rate of tax (12.5%)  | 1.8  | 4.4  | 
| Tax charge/(credit) for the year  | 4.7  | (3.3)  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| At 1 April  | 2.9  | 2.8  | 
| Tax credit in the profit and loss account  | —  | 0.1  | 
| At 31 March  | 2.9  | 2.9  | 
| Right-of-use  | |||
| Leasehold  | assets  | ||
| improvements  | Buildings  | Total  | |
| US$m  | US$m  | US$m  | |
| Cost  | |||
| At 1 April 2024 and 31 March 2025  | 2.2  | 3.7  | 5.9  | 
| Accumulated depreciation  | |||
| At 1 April 2024  | 0.4  | 0.8  | 1.2  | 
| Charge for the year  | 0.3  | 0.4  | 0.7  | 
| At 31 March 2025  | 0.7  | 1.2  | 1.9  | 
| Net book amount at 31 March 2024  | 1.8  | 2.9  | 4.7  | 
| Net book amount at 31 March 2025  | 1.5  | 2.5  | 4.0  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Current  | 0.4  | 0.4  | 
| Non-current  | 2.8  | 3.2  | 
| At 31 March  | 3.2  | 3.6  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Less than one year  | 0.5  | 0.5  | 
| One to two years  | 0.5  | 0.5  | 
| Two to three years  | 0.5  | 0.5  | 
| Three to four years  | 0.5  | 0.5  | 
| Four to five years  | 0.5  | 0.5  | 
| Over five years  | 1.3  | 1.9  | 
| Total undiscounted lease obligation at 31 March  | 3.8  | 4.4  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Depreciation charge for right-of-use assets  | 0.4  | 0.4  | 
| Interest expense  | 0.2  | 0.3  | 
| 0.6  | 0.7  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Cost  | ||
| At 1 April  | 21,960.1  | 20,688.6  | 
| Additions – fair value of share incentives issued to Group employees  | 126.9  | 132.3  | 
| Additions – fair value of financial guarantees to subsidiary undertakings  | —  | 18.2  | 
| Additional investment in direct subsidiary undertakings  | —  | 1,200.0  | 
| Disposal through Group reorganisation  | —  | (79.0)  | 
| At 31 March  | 22,087.0  | 21,960.1  | 
| Accumulated impairment  | ||
| At 1 April  | —  | 79.0  | 
| Disposal through Group reorganisation  | —  | (79.0)  | 
| At 31 March  | —  | —  | 
| Net book amount at 31 March  | 22,087.0  | 21,960.1  | 
| Company  | Country of incorporation  | 
| Experian Group Services Limited  | Ireland  | 
| Experian Holdings Ireland Limited  | Ireland  | 
| 2025  | 2024  | |
| US$m  | US$m  | |
| Amounts owed by Group undertakings  | 81.7  | 248.8  | 
| Other debtors  | 0.7  | 1.0  | 
| Corporation tax asset  | —  | 4.4  | 
| 82.4  | 254.2  | 
| Due within  | Due after more  | Due within  | Due after more  | |
| one year  | than one year  | one year  | than one year  | |
| 2025  | 2025  | 2024  | 2024  | |
| US$m  | US$m  | US$m  | US$m  | |
| Amounts owed to Group undertakings  | 13.3  | —  | 12.0  | —  | 
| Lease obligation (note M)  | 0.4  | 2.8  | 0.4  | 3.2  | 
| Corporation tax  | 5.2  | —  | —  | —  | 
| Accruals and deferred income  | 8.1  | 10.6  | 7.4  | 13.1  | 
| 27.0  | 13.4  | 19.8  | 16.3  | 
| 2025  | 2024  | |
| Allotted and fully paid  | US$m  | US$m  | 
| 972,976,312 (2024: 972,189,047) ordinary shares of 10 US cents  | 73.4  | 73.3  | 
| 20 (2024: 20) deferred shares of 10 US cents  | —  | —  | 
| 73.4  | 73.3  | 
| Number of shares held  | Cost of shares held  | |||||
| Treasury  | Trusts  | Total  | Treasury  | Trusts  | Total  | |
| million  | million  | million  | US$m  | US$m  | US$m  | |
| At 1 April 2024  | 53.4  | 5.7  | 59.1  | 1,074.3  | 237.3  | 1,311.6  | 
| Purchase of shares by employee trusts  | —  | 1.8  | 1.8  | —  | 82.6  | 82.6  | 
| Purchase of shares held as treasury shares  | 2.6  | —  | 2.6  | 117.6  | —  | 117.6  | 
| Shares delivered to a subsidiary in connection  | ||||||
| with an acquisition  | (0.1)  | —  | (0.1)  | (5.9)  | —  | (5.9)  | 
| Other vesting of awards and exercises of  | ||||||
| share options  | (1.0)  | (3.1)  | (4.1)  | (15.5)  | (72.5)  | (88.0)  | 
| At 31 March 2025  | 54.9  | 4.4  | 59.3  | 1,170.5  | 247.4  | 1,417.9  | 
| Number of shares held  | Cost of shares held  | |||||
| Treasury  | Trusts  | Total  | Treasury  | Trusts  | Total  | |
| million  | million  | million  | US$m  | US$m  | US$m  | |
| At 1 April 2023  | 52.3  | 6.7  | 59.0  | 1,020.8  | 220.4  | 1,241.2  | 
| Purchase of shares by employee trusts  | —  | 1.5  | 1.5  | —  | 56.0  | 56.0  | 
| Purchase of shares held as treasury shares  | 2.1  | —  | 2.1  | 69.3  | —  | 69.3  | 
| Other vesting of awards and exercises of  | ||||||
| share options  | (1.0)  | (2.5)  | (3.5)  | (15.8)  | (39.1)  | (54.9)  | 
| At 31 March 2024  | 53.4  | 5.7  | 59.1  | 1,074.3  | 237.3  | 1,311.6  | 
| Company  | Country of incorporation  | 
| Experian Strategic Solutions SA  | Argentina  | 
| Avention Australia Pty Ltd  | Australia  | 
| CLI Lawyers Pty Ltd  | Australia  | 
| CLI Lawyers SA Pty Ltd  | Australia  | 
| Credit Data Solutions Acquisition Pty Ltd  | Australia  | 
| Credit Data Solutions Finance Pty Ltd  | Australia  | 
| Credit Data Solutions Pty Ltd  | Australia  | 
| Experian Asia Pacific Pty Ltd  | Australia  | 
| Experian Australia Credit Services Pty Ltd  | Australia  | 
| Experian Australia Fraud Services Pty Ltd  | Australia  | 
| Experian Australia Holdings Pty Ltd  | Australia  | 
| Experian Australia Pty Ltd  | Australia  | 
| illion (Nominees) Pty Limited  | Australia  | 
| illion Australia Pty Ltd  | Australia  | 
| illion Australia Unit Trust **  | Australia  | 
| illion Consumer Marketing Unit Trust**  | Australia  | 
| illion Data Registries Pty Ltd  | Australia  | 
| illion Decisioning Pty Ltd  | Australia  | 
| illion Decisioning Technologies Pty Ltd  | Australia  | 
| illion Financial Viability Reports Pty Ltd  | Australia  | 
| illion Group Holdings Pty Ltd  | Australia  | 
| illion Marketing Pty Ltd  | Australia  | 
| illion Marketplaces (Australia) Pty Ltd  | Australia  | 
| illion Open Data Solutions Holdings Pty Ltd  | Australia  | 
| illion Open Data Solutions IP Pty Ltd  | Australia  | 
| illion Open Data Solutions Pty Ltd  | Australia  | 
| illion Risk Solutions Pty Ltd  | Australia  | 
| illion Services Pty Ltd  | Australia  | 
| Perceptive Communication Holdings Pty Ltd  | Australia  | 
| Perceptive Communication Pty Ltd  | Australia  | 
| Experian Austria GmbH  | Austria  | 
| Experian Österreichische Verwaltungsgesellschaft  | |
| mbH*  | Austria  | 
| Financeira Veloz Holding Financeira S.A.  | Brazil  1  | 
| Holding Veloz Investimentos e Participações S.A.  | Brazil  2  | 
| Mova Sociedade de Empréstimo Entre Pessoas S.A.  | Brazil  3  | 
| Pagueveloz Instituição de Pagamento Ltda.  | Brazil  4  | 
| Salaryfits Sistemas Ltda.  | Brazil  5  | 
| Salt Participações S.A.  | Brazil  5  | 
| Salt Tecnologia Ltda.  | Brazil  5  | 
| Serasa S.A.  | Brazil  6  | 
| SÓFacil Tecnologia Ltda.  | Brazil  7  | 
| Experian Bulgaria EAD  | Bulgaria  | 
| Experian Canada Inc.  | Canada  | 
| Experian Chile S.A.  | Chile  1  | 
| Experian Holdings Chile SpA  | Chile  2  | 
| Experian Services Chile S.A.  | Chile  3  | 
| Beijing Yiboruizhi Technology Co., Ltd  | China  1  | 
| Experian Credit Service (Beijing) Company Limited  | China  2  | 
| Experian Hong Kong Holdings Limited  | China  3  | 
| Experian Hong Kong Limited  | China  3  | 
| Experian Information Technology (Beijing) Company  | |
| Limited  | China  4  | 
| Experian Colombia S.A.  | Colombia  | 
| Experian Services Costa Rica, S.A.  | Costa Rica  | 
| Experian A/S  | Denmark  1  | 
| Noitso A/S  | Denmark  2  | 
| Company  | Country of incorporation  | 
| CCN UK 2005 Limited  | England and Wales  | 
| CCN UK Unlimited  | England and Wales  | 
| Chatsworth Investments Limited  | England and Wales  | 
| EHI 2005 Limited  | England and Wales  | 
| EHI UK Unlimited  | England and Wales  | 
| EIS 2005 Limited  | England and Wales  | 
| EIS UK Unlimited  | England and Wales  | 
| Experian (UK) Finance Limited  | England and Wales  | 
| Experian (UK) Holdings 2006 Limited  | England and Wales  | 
| Experian CIS Limited  | England and Wales  | 
| Experian Colombia Investments Limited  | England and Wales  | 
| Experian Corporate Services Limited  | England and Wales  | 
| Experian Europe and Middle East Limited  | England and Wales  | 
| Experian Europe Unlimited  | England and Wales  | 
| Experian Finance 2012 Unlimited*  | England and Wales  | 
| Experian Finance plc  | England and Wales  | 
| Experian Group Limited  | England and Wales  | 
| Experian Holdings (UK) Unlimited  | England and Wales  | 
| Experian Holdings Limited  | England and Wales  | 
| Experian International Unlimited  | England and Wales  | 
| Experian Investment Holdings Limited  | England and Wales  | 
| Experian Latam Holdings Unlimited  | England and Wales  | 
| Experian Limited  | England and Wales  | 
| Experian NA Holdings Unlimited*  | England and Wales  | 
| Experian Nominees Limited  | England and Wales  | 
| Experian SURBS Investments Limited  | England and Wales  | 
| Experian Technology Limited  | England and Wales  | 
| Experian US Holdings Unlimited  | England and Wales  | 
| G.U.S. Property Management Limited*  | England and Wales  | 
| GUS 1998 Unlimited*  | England and Wales  | 
| GUS 2000 Finance Unlimited  | England and Wales  | 
| GUS 2004 Limited  | England and Wales  | 
| GUS Catalogues Unlimited*  | England and Wales  | 
| GUS Finance (2004) Limited  | England and Wales  | 
| GUS Holdings (2004) Limited  | England and Wales  | 
| GUS Holdings Unlimited  | England and Wales  | 
| GUS International Holdings Limited*  | England and Wales  | 
| GUS Ireland Holdings Limited*  | England and Wales  | 
| GUS Overseas Holdings Limited*  | England and Wales  | 
| GUS Overseas Investments Limited*  | England and Wales  | 
| GUS US Holdings 2024 Limited*  | England and Wales  | 
| illion Digital Tech Solutions UK Limited  | England and Wales  | 
| International Communication & Data Limited  | England and Wales  | 
| Intozetta Holdings Limited*  | England and Wales  | 
| Intozetta Limited*  | England and Wales  | 
| Pay Dashboard Limited*  | England and Wales  | 
| Paylink Outsource Services Limited  | England and Wales  | 
| Paylink Solutions Limited  | England and Wales  | 
| Serasa Finance Limited  | England and Wales  | 
| Tallyman Limited*  | England and Wales  | 
| Tapad UK Limited*  | England and Wales  | 
| The Royal Exchange Company (Leeds) Unlimited*  | England and Wales  | 
| The Witney Mattress, Divan & Quilt Co. Unlimited*  | England and Wales  | 
| Compuscan (Pty) Ltd  | eSwatini  | 
| Experian France S.A.S.  | France  | 
| 3 C Deutschland GmbH  | Germany  1  | 
| Boniversum GmbH  | Germany  2  | 
| Company  | Country of incorporation  | 
| Experian GmbH (formerly Informa Solutions GmbH)  | Germany  3  | 
| Informa HIS GmbH  | Germany  4  | 
| Infoscore Consumer Data GmbH  | Germany  3  | 
| Tapad Germany GmbH  | Germany  5  | 
| GHU Insurance Company Limited  | Guernsey  | 
| Experian Account Aggregator Private Limited  | India  1  | 
| Experian Credit Information Company of India Private  | |
| Limited  | India  2  | 
| Experian Services India (Private Limited)  | India  2  | 
| PT. Experian Decision Analytics Indonesia*  | Indonesia  | 
| Experian Europe Designated Activity Company  | Ireland  | 
| Experian Foundation Company Limited by Guarantee  | Ireland  | 
| Experian Group Services Limited  | Ireland  | 
| Experian Holdings Ireland Limited  | Ireland  | 
| Experian Ireland Investments Limited*  | Ireland  | 
| Experian Ireland Limited  | Ireland  | 
| GUS Finance Ireland Unlimited Company*  | Ireland  | 
| GUS Investments 2003 Unlimited Company  | Ireland  | 
| Experian Holding Italia S.r.l.  | Italy  | 
| Experian Italia S.p.A.  | Italy  | 
| Experian Japan Co., Ltd  | Japan  | 
| Experian Lesotho (Pty) Ltd  | Lesotho  | 
| Experian Information Services (Malaysia) Sdn. Bhd.  | Malaysia  | 
| Experian (Malaysia) Sdn. Bhd.  | Malaysia  | 
| Experian Marketing Services (Malaysia) Sdn Bhd  | Malaysia  | 
| Experian de Mexico S. de R.L. de C.V.  | Mexico  | 
| Scorex S.A.M.  | Monaco  | 
| Experian Sistema de Informacao de Credito S.A.*  | Mozambique  | 
| Experian Micro Analytics B.V.  | The Netherlands  | 
| Experian Nederland B.V.  | The Netherlands  | 
| Experian Scorex Russia B.V.  | The Netherlands  | 
| GUS Europe Holdings B.V.  | The Netherlands  | 
| GUS Holdings B.V.  | The Netherlands  | 
| GUS Treasury Services B.V.  | The Netherlands  | 
| CDS Holdings (NZ) Limited  | New Zealand  1  | 
| Experian New Zealand Limited  | New Zealand  1  | 
| illion Digital Tech Solutions (AUS) Limited  | New Zealand  1  | 
| illion Digital Tech Solutions Holdings Limited  | New Zealand  1  | 
| illion Digital Tech Solutions Limited  | New Zealand  1  | 
| illion Marketplaces (New Zealand) Limited  | New Zealand  1  | 
| illion New Zealand Limited  | New Zealand  1  | 
| illion New Zealand Marketing Services Limited  | New Zealand  2  | 
| illion Tenancy Limited  | New Zealand  1  | 
| illion Tenderlink Limited  | New Zealand  1  | 
| Experian AS  | Norway  1  | 
| Experian Gjeldsregister AS  | Norway  1  | 
| Tapad Norway AS  | Norway  2  | 
| APC Buró, S.A.  | Panama  | 
| Experian Perú S.A.C.  | Peru  | 
| Experian Philippines, Inc  | The Philippines  | 
| Experian Polska spółka z ograniczoną  | |
| odpowiedzialnością*  | Poland  | 
| Gabi Polska spółka z ograniczoną odpowiedzialnością  | Poland  | 
| DP Management Pte. Ltd.  | Singapore  | 
| Experian Asia-Pacific Holdings Pte. Ltd.  | Singapore  | 
| Company  | Country of incorporation  | 
| Experian Credit Services Singapore Pte. Ltd.  | Singapore  | 
| Experian Singapore Pte. Ltd.  | Singapore  | 
| Compuscan Holdings International (Pty) Ltd  | South Africa  1  | 
| CSH Group (Pty) Ltd  | South Africa  1  | 
| Experian South Africa (Pty) Limited  | South Africa  2  | 
| Axesor Business Process Outsourcing S.L.U.  | Spain  1  | 
| Axesor Conocer Para Decidir, S.A.  | Spain  1  | 
| Experian Bureau de Crédito, S.A.  | Spain  2  | 
| Experian España, S.L.U.  | Spain  2  | 
| Experian Holdings España, S.L.U.  | Spain  2  | 
| Experian Latam España Inversiones, S.L.  | Spain  3  | 
| Experian Switzerland AG  | Switzerland  | 
| Experian (Thailand) Co., Ltd*  | Thailand  | 
| Experian Bilgi Hizmetleri Limited Şirketi  | Türkiye  | 
| Auto I.D., Inc.  | USA  1  | 
| BillFixers, LLC  | USA  2  | 
| CIC Plus, LLC  | USA  3  | 
| ClarityBlue Inc.  | USA  3  | 
| Clarity Services, Inc.  | USA  2  | 
| ConsumerInfo.com, Inc.  | USA  4  | 
| CSIdentity Corporation  | USA  2  | 
| CSIdentity Insurance Services, Inc.  | USA  6  | 
| Employment Tax Servicing, LLC  | USA  4  | 
| Experian Background Data, Inc.  | USA  2  | 
| Experian Credit Advisors, Inc.  | USA  2  | 
| Experian Data Corp  | USA  2  | 
| Experian Employer Services, Inc.  | USA  5  | 
| Experian Fraud Prevention Solutions, Inc.  | USA  2  | 
| Experian Health, Inc.  | USA  2  | 
| Experian Holdings, Inc.  | USA  2  | 
| Experian Information Solutions, Inc.  | USA  7  | 
| Experian Marketing Solutions, LLC  | USA  2  | 
| Experian Reserved Response, Inc.  | USA  2  | 
| Experian Services Corp.  | USA  2  | 
| Frontline eSolutions, LLC  | USA  8  | 
| Gabi Personal Insurance Agency, Inc.  | USA  2  | 
| illion Digital Tech Solutions (US) LLC  | USA  3  | 
| illion Digital Tech Solutions Canada Ltd  | USA  3  | 
| MyExperian, Inc.  | USA  2  | 
| My Health Direct, Inc.  | USA  2  | 
| Neuro-ID, Inc.  | USA  3  | 
| Predictive Pop, Inc.  | USA  3  | 
| RewardStock, Inc.  | USA  2  | 
| Statschedules India, LLC  | USA  2  | 
| String Automotive Solutions, Inc.  | USA  2  | 
| String Enterprises, Inc.  | USA  2  | 
| Tapad, Inc.  | USA  2  | 
| Tax Credit Co, LLC  | USA  2  | 
| Tayvah, LLC  | USA  4  | 
| TCC Arizona, LLC  | USA  9  | 
| TCC Services, LLC  | USA  10  | 
| The 41st Parameter, Inc.  | USA  2  | 
| WaveHDC LLC  | USA  2  | 
| Waveland Technologies LLC  | USA  3  | 
| Country of incorporation  | Address of registered office  | 
| Argentina  | Olga Cossettini 363, Piso 3, Edificio Yacht VI, Ciudad de  | 
| Buenos Aires  | |
| Australia  | Level 26, 2 Southbank Boulevard, Southbank, VIC 3006  | 
| Austria  | Strozzigasse 10/14, 1080 Vienna  | 
| Brazil  1  | Rua Dr. Léo de Carvalho, No.74, 5th Floor, Suite 505,  | 
| Room 2, Ibiza Building, Velha, Blumenau, Santa  | |
| Catarina, 89036-239  | |
| Brazil  2  | Rua Hermann Huscher, 113, sala 01 subsala 06,  | 
| District: Vila Formosa, Blumenau, Santa Catarina,  | |
| 89.023-000  | |
| Brazil  3  | Avenida Brigadeiro Faria Lima, No. 1306, 6th floor, São  | 
| Paulo, 01451-914  | |
| Brazil  4  | Rua Dr. Léo de Carvalho, No. 74, 5th Floor, Suites 505,  | 
| 506 and 507, Ibiza Building, Velha, Blumenau, Santa  | |
| Catarina, 89036-239  | |
| Brazil  5  | Alameda Oscar Niemeyer, No. 132, Room 1102, Nova  | 
| Lima, Minas Gerais, 34.006-049  | |
| Brazil  6  | Avenida das Nações Unidas, 14401 – Torre C-1 Parque  | 
| da Cidade Complex, Suites 191, 192, 201, 202, 211,  | |
| 212, 221, 222, 231, 232, 241 e 242, Chácara Santo  | |
| Antônio, São Paulo/SP, 04794-000  | |
| Brazil  7  | Rua Tapajós, 941, 1st floor, Bairro Barcelona, São  | 
| Caetano do Sul, São Paulo, 09551-230  | |
| Bulgaria  | 86 Tsarigradsko shose boul., Mladost region, 1784  | 
| Sofia  | |
| Canada  | 199 Bay Street, Suite 4000, Toronto, Ontario M5L 1A9  | 
| Chile  1  | Av. Andrés Bello 2457, Piso 34 C, Santiago  | 
| Chile  2  | Av el Golf 40 piso, 20 Santiago  | 
| Chile  3  | Avenida Presidente Riesco #5561, Oficina #402, Las  | 
| Condes, Santiago, 7561127  | |
| China  1  | Room 604 6F, One Indigo, 20 Jiuxianqiao Road,  | 
| Chaoyang District, Beijing, 100015  | |
| China  2  | Room 05D, 20th Floor, NO.77, Jianguo Road, Chaoyang  | 
| District, Beijing  | |
| China  3  | 31/F., Tower Two, Times Square, 1 Matheson Street,  | 
| Causeway Bay, Hong Kong  | |
| China  4  | Room 05C, 20th Floor, NO.77, Jianguo Road, Chaoyang  | 
| District, Beijing  | |
| Colombia  | Carrera 7, No. 76 -35 Floor 10, Bogota  | 
| Costa Rica  | Edificio Oller Abogados, Provincia de 5551007, Av. 18,  | 
| San José Province, San José  | |
| Denmark  1  | Lyngbyvej 2, DK-2100, Copenhagen  | 
| Denmark  2  | Krumstappen 4, St. 2500 VALBY  | 
| England and Wales  | The Sir John Peace Building, Experian Way, NG2  | 
| Business Park, Nottingham, NG80 1ZZ  | |
| eSwatini  | c/o PricewaterhouseCoopers, Rhus Office Park, Kal  | 
| Grant Street, Mbabane  | |
| France  | 19 boulevard Malesherbes, 75008 Paris  | 
| Germany  1  | Edisonstraße 19, 74076, Heilbronn  | 
| Germany  2  | Hammfelddamm 13, 41460 Neuss  | 
| Germany  3  | Rheinstraße 99, 76532, Baden-Baden  | 
| Germany  4  | Kreuzberger Ring 68, 65205, Wiesbaden  | 
| Germany  5  | Walther-von-Cronberg-Platz 13, 60594 Frankfurt a.  | 
| Main  | |
| Guernsey  | PO Box 155, Mill Court, La Charroterie, St Peter Port,  | 
| GY1 4ET  | |
| India  1  | 1108 Hubtown Solaris, N. S. Phadke Road, Andheri  | 
| (East), Mumbai 400069  | |
| India  2  | 5th Floor, East Wing, Tower 3, Equinox Business Park,  | 
| LBS Marg, Kurla (West), Mumbai, 400070  | 
| Country of incorporation  | Address of registered office  | 
| Indonesia  | World Trade Centre 3 Lantai 27, Jl. Jendral Sudirman  | 
| Kav. 29-31, Kelurahan Karet, Kecamatan Setiabudi,  | |
| Kota Adm. Jakarta Selatan, DKI Jakarta  | |
| Ireland  | 2 Cumberland Place, Fenian Street, Dublin 2, D02 HY05  | 
| Italy  | Piazza dell’Indipendenza No 11/B, 00185, Rome  | 
| Japan  | 1-1-1 Otemachi, Chiyoda-ku, Tokyo  | 
| Lesotho  | Plot No. 582, Ha Hoohlo Extension, Maseru  | 
| Malaysia  | Level 13, Menara 1 Sentrum, 201, Jalan Tun  | 
| Sambanthan, Brickfields, 50470 Kuala Lumpur  | |
| Mexico  | Calle Pedregal 24 S 300 P 3 Col. Molino del Rey, Miguel  | 
| Hidalgo, Ciudad de México, CP 11040  | |
| Monaco  | Athos Palace 2, Rue de la Lujerneta 6eme etage – lots  | 
| 27 et 30, MC98000  | |
| Mozambique  | Edifício Millennium Park, Avenida Vladimir Lenine, 174,  | 
| 13°, Maputo  | |
| The Netherlands  | Grote Marktstraat 49, 2511BH’s-Gravenhage  | 
| New Zealand  1  | Bell Gully, Deloitte Centre, Level 5, 1 Queen Street,  | 
| Auckland, 1010  | |
| New Zealand  2  | Level 9, 4 Williamson Avenue, Grey Lynn, Auckland,  | 
| 1021  | |
| Norway  1  | Professor Kohts vei 9, 1366 Lysaker, Bærum  | 
| Norway  2  | 5.etg. Edvard Storms gate, 20166, Oslo  | 
| Panama  | Panamá Pacífico, International Business Park, Edif.  | 
| 3845, 4to Piso, Ciudad de Panamá  | |
| Peru  | Av. Canaval y Moreyra Nº 480, Piso 19, San Isidro, Lima  | 
| The Philippines  | 25th Floor Philam Life Tower, 8767 Paseo de Roxas,  | 
| Makati City  | |
| Poland  | Henryk Sienkiewicz street 82/84; 90-318, Łódź  | 
| Singapore  | 10 Kallang Avenue, #05-18 Aperia Tower 2, Singapore,  | 
| 339510  | |
| South Africa  1  | Experian House, 3 Neutron Avenue, Techno Park,  | 
| Stellenbosch, 7600  | |
| South Africa  2  | Experian House, Ballyoakes Office Park, 35 Ballyclare  | 
| Drive, Bryanston, Sandton, 2021  | |
| Spain  1  | Calle Graham Bell, s/n, Edificio Axesor, Parque  | 
| Empresarial San Isidro, C.P. 18100, Armilla  | |
| Spain  2  | C/Principe de Vergara 132, 2a Planta, 28002, Madrid  | 
| Spain  3  | Principe de Vergara 131 1°, Madrid  | 
| Switzerland  | Thurgauerstrasse 101a, CH-8152, Opfikon  | 
| Thailand  | No. 9, G Tower Building, 33rd Floor, Rama 9 Road, Huai  | 
| Kwang, Bangkok  | |
| Türkiye  | River Plaza Büyükdere Cad.Bahar Sok.No:13 K:8  | 
| Levent 34394 İstanbul  | |
| USA  1  | The Corporation Trust Company, 1209 Orange Street,  | 
| Wilmington DE 19801  | |
| USA  2  | C T Corporation, 300 Montvue Road, Knoxville TN  | 
| 37919-5546  | |
| USA  3  | 475 Anton Boulevard, Costa Mesa, CA 92626  | 
| USA  4  | C T Corporation System, 818 West 7th Street, Los  | 
| Angeles, CA 90017  | |
| USA  5  | C T Corporation System, 155 Federal Street, Ste 700,  | 
| Boston Massachusetts 02110  | |
| USA  6  | 208 South LaSalle St., Ste 814 Chicago IL 60604  | 
| USA  7  | 4400 Easton Commons Way, Ste 125, Columbus Ohio  | 
| 43219  | |
| USA  8  | 3026 Woodbridge Lane, Canton, GA 30114  | 
| USA  9  | 2711 Centerville Rd Ste 400, Wilmington DE 19808  | 
| USA  10  | 255 W Sunset Blvd. Ste, 2200 Los Angeles CA 90028  | 
| Country of  | ||
| Company  | Holding  | incorporation  | 
| Simple KYC Pty Ltd  | 20.0%  | Australia  | 
| London & Country Mortgages Limited  | 25.0%  | England and Wales  | 
| Who Owns Whom (Pty) Limited  | 32.9%  | South Africa  | 
| Online Data Exchange LLC  | 25.0%  | USA  | 
| Opt-Out Services, LLC  | 25.0%  | USA  | 
| Central Source LLC  | 33.3%  | USA  | 
| New Management Services, LLC  | 33.3%  | USA  | 
| VantageScore Solutions, LLC  | 33.3%  | USA  | 
| Country of incorporation  | |
| Undertaking  | or operation  | 
| Brigstock Finance Limited*  | England and Wales  | 
| Experian Medical Plan Limited  | England and Wales  | 
| Experian Pension Scheme  | England and Wales  | 
| Experian Retirement Savings Plan  | England and Wales  | 
| Experian Retirement Savings Trustees Limited  | England and Wales  | 
| Experian Trustees Limited  | England and Wales  | 
| Experian UK Approved All-Employee Share Plan  | England and Wales  | 
| The Pension and Life Assurance Plan of Sanderson  | |
| Systems Limited  | England and Wales  | 
| Versorgungsordnung der Barclays Industrie Bank  | |
| GmbH vom April 1988 (incl. amendments)  | Germany  | 
| The Experian Ireland Limited Pension Plan  | Ireland  | 
| The Experian plc Employee Share Trust  | Jersey  |