Financial instruments - risk management (Details 2) - GBP (£) £ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|---|---|
| IfrsStatementLineItems [Line Items] | ||||
| Cash and cash equivalents | £ 8,534 | £ 1,669 | £ 5,971 | £ 2,836 |
| Foreign exchange risk [member] | United Kingdom, Pounds | ||||
| IfrsStatementLineItems [Line Items] | ||||
| Cash and cash equivalents | 97 | 212 | 2,244 | |
| Foreign exchange risk [member] | United States of America, Dollars | ||||
| IfrsStatementLineItems [Line Items] | ||||
| Cash and cash equivalents | 8,436 | 1,457 | 3,727 | |
| Foreign exchange risk [member] | Other Currency [Member] | ||||
| IfrsStatementLineItems [Line Items] | ||||
| Cash and cash equivalents | £ 1 |