v3.24.1.1.u2
Trade and other receivables - Schedule of receivables by geographical area (Details) - GBP (£)
£ in Millions
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Disclosure of financial assets [line items]      
Trade receivables £ 4,332 £ 3,052  
Accrued income 885 1,126  
Trade receivables and accrued income, net 2,827 3,149  
UK      
Disclosure of financial assets [line items]      
Trade receivables and accrued income, net 496 862  
US      
Disclosure of financial assets [line items]      
Trade receivables and accrued income, net 2,331 2,287  
Gross carrying amount      
Disclosure of financial assets [line items]      
Accrued income 885 1,126  
Gross carrying amount | UK      
Disclosure of financial assets [line items]      
Accrued income 337 650  
Gross carrying amount | US      
Disclosure of financial assets [line items]      
Accrued income 548 476  
Trade receivables | Gross carrying amount      
Disclosure of financial assets [line items]      
Trade receivables 2,501 2,583  
Trade receivables | Gross carrying amount | UK      
Disclosure of financial assets [line items]      
Trade receivables 162 223  
Trade receivables | Gross carrying amount | US      
Disclosure of financial assets [line items]      
Trade receivables 2,339 2,360  
Trade receivables | Accumulated impairment      
Disclosure of financial assets [line items]      
Trade receivables (559) (560) £ (741)
Trade receivables | Accumulated impairment | UK      
Disclosure of financial assets [line items]      
Trade receivables (3) (11)  
Trade receivables | Accumulated impairment | US      
Disclosure of financial assets [line items]      
Trade receivables £ (556) £ (549)