Material accounting policies - Additional Information (Detail) - GBP (£) £ in Thousands |
6 Months Ended | |||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure Of Summary Of Material Accounting Policies [Line Items] | ||||
| Accumulated deficit | £ (253,749) | £ (252,334) | ||
| Cash flows from (used in) operating activities | (5,245) | £ (7,595) | ||
| Cash and cash equivalents | £ 19,503 | £ 8,443 | £ 24,251 | £ 6,749 |
| X | ||||||||||
- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition A component of equity representing the entity's cumulative undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Disclosure Of Summary Of Material Accounting Policies. No definition available.
|