Lease liabilities - Reconciliation of the finance lease creditors (Details) - GBP (£) £ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Reconciliation of undiscounted lease payments to net investment in finance lease [abstract] | ||
| Beginning balance | £ 2,620 | £ 3,161 |
| Additions | 196 | 182 |
| Reversal of lease liability | (193) | |
| Interest element of payments to lease creditors | (156) | (199) |
| Principal element of payments to lease creditors | (615) | (530) |
| Interest expense of leases | 156 | 199 |
| Ending balance | £ 2,201 | £ 2,620 |