v3.24.1.1.u2
Trade and other receivables - Schedule of reconciliation of changes in allowance account for credit losses (Details) - GBP (£)
£ in Millions
12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Reconciliation of changes in allowance account for credit losses of financial assets [abstract]    
Provision for credit losses of financial assets, beginning balance £ (3,052)  
Provision for credit losses of financial assets, ending balance (4,332) £ (3,052)
Trade receivables | Accumulated impairment    
Reconciliation of changes in allowance account for credit losses of financial assets [abstract]    
Provision for credit losses of financial assets, beginning balance 560 741
Exchange adjustments (12) 51
Charge for the year, net of recoveries 179 220
Uncollectible amounts written off (163) (452)
Reclassification to held for sale (note 10) (5) 0
Provision for credit losses of financial assets, ending balance £ 559 £ 560