Investments in associates and joint ventures - Summarised financial information, equity accounted associates and joint ventures (Details) - GBP (£) £ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Joint ventures | |||
| Disclosure of associates [line items] | |||
| (Loss)/Profit from continuing operations | £ 0 | £ 0 | £ 0 |
| Other comprehensive income | 0 | 0 | 0 |
| Total comprehensive (loss)/income from continuing operations | 0 | 0 | 0 |
| Associates | |||
| Disclosure of associates [line items] | |||
| (Loss)/Profit from continuing operations | 0 | 0 | (4) |
| Other comprehensive income | 0 | 0 | 0 |
| Total comprehensive (loss)/income from continuing operations | £ 0 | £ 0 | £ (4) |