v3.25.4
Financial Risk Management - Summary of Net Debt Position (Detail) - GBP (£)
£ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of net debt [line items]    
Cash and cash equivalents £ 333 £ 543
Financial liabilities (1,782) (1,825)
Derivative financial instruments 13 (7)
Revolving credit facility (297) 0
Investment in finance lease receivable 66 83
Lease liabilities (478) (517)
Net debt (1,069) (853)
Overdrafts [Member]    
Disclosure of net debt [line items]    
Financial liabilities 0 0
Bonds [member]    
Disclosure of net debt [line items]    
Financial liabilities £ (706) £ (955)