v3.26.3
Dividends - Narrative (Details) - GBP (£)
£ / shares in Units, £ in Millions
12 Months Ended
Mar. 31, 2027
Mar. 31, 2026
Mar. 31, 2025
Summary Of Dividends [Line Items]      
Dividends declared before financial statements authorised for issue (in GBP per share) £ 0.1697    
Dividends declared before financial statements authorised for issue £ 853    
Final dividend      
Summary Of Dividends [Line Items]      
Cash dividend paid (in GBP per share)   £ 0.3214 £ 0.3088
Cash dividend paid   £ 990 £ 894
Scrip dividend   £ 609 £ 617