v3.26.1
Financial risk management - Credit risk, narrative (Details) - Credit risk - GBP (£)
£ in Millions
Mar. 31, 2026
Mar. 31, 2025
Disclosure of detailed information about financial instruments [line items]    
Gross amounts offset £ 0 £ 0
Bank account and bank overdraft    
Disclosure of detailed information about financial instruments [line items]    
Gross amounts offset £ 0 £ 0