Related party transactions and Directors' remuneration - Disclosure of remuneration of Directors and other Key Management Personnel (Details) - GBP (£) £ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of transactions between related parties [abstract] | |||
| Salaries and other short-term benefits | £ 42.3 | £ 42.9 | £ 46.1 |
| Pension costs | 0.2 | 0.2 | 0.2 |
| Other long-term benefits | 10.8 | 10.8 | 10.8 |
| Share-based payments | 26.5 | 21.9 | 16.3 |
| Employer social security charges on emoluments | 7.9 | 7.2 | 8.2 |
| Costs recognised for accounting purposes | 87.7 | 83.0 | 81.6 |
| Employer social security charges on emoluments | (7.9) | (7.2) | (8.2) |
| Other long-term benefits – difference between awards granted and costs recognised | 7.6 | 5.3 | 2.1 |
| Share-based payments – difference between awards granted and costs recognised | 6.8 | 2.6 | 4.5 |
| Total remuneration awarded | £ 94.2 | £ 83.7 | £ 80.0 |