v3.26.1
Cash and cash equivalents and total borrowings - Cash Reconciliation (Details) - GBP (£)
£ in Millions
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Cash Reconciliation [Line Items]        
Cash and cash equivalents as presented in the consolidated balance sheet £ 2,363 £ 2,694    
Bank overdrafts (187) (168)    
Cash and cash equivalents as presented in the consolidated cash flow statement 2,176 2,706 £ 1,168 £ 2,467
Borrowings due within one year (excluding bank overdrafts) (1,292) (654)    
Borrowings due after one year (3,866) (4,114)    
Total borrowings (excluding bank overdrafts) £ (5,158) (4,768)    
Previously stated        
Cash Reconciliation [Line Items]        
Cash and cash equivalents as presented in the consolidated cash flow statement   £ 2,526