v3.26.1
Goodwill - Schedule of changes in intangible assets and goodwill (Details) - GBP (£)
£ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Reconciliation of changes in goodwill [abstract]    
Goodwill at beginning of period £ 9,532 £ 9,729
Exchange adjustments (115) (117)
Reclassification to held for sale   (80)
Goodwill at end of period £ 9,417 £ 9,532