v3.25.3
Dividends - Narrative (Details) - GBP (£)
£ / shares in Units, £ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Summary Of Dividends [Line Items]      
Dividends declared before financial statements authorised for issue (in GBP per share) £ 0.1635    
Dividends declared before financial statements authorised for issue £ 811    
Final dividend      
Summary Of Dividends [Line Items]      
Cash dividend paid (in GBP per share)   £ 0.3088 £ 0.3912
Cash dividend paid   £ 894 £ 811
Scrip dividend   £ 617 £ 643