v3.25.4
Lease arrangements - Additional information (Details) - GBP (£)
£ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Lease arrangements      
Interest expense on lease liabilities £ 4 £ 5 £ 6
Leases with future cash outflows £ 30 £ 7