Net finance costs - Additional information (Details) - GBP (£) £ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Hedging instruments and bonds | |||
| Fair value movements on cash flow hedges | £ 55 | £ 11 | £ 29 |
| Transfer to profit from cash flow hedge reserve | (36) | (20) | 18 |
| Interest expense on debt instruments issued, early redemption charge | 26 | ||
| Derivatives | |||
| Hedging instruments and bonds | |||
| Fair value movements on cash flow hedges | 0 | 1 | (2) |
| Transfer to profit from cash flow hedge reserve | £ 1 | £ 2 | £ 1 |