v3.26.1
Intangible Assets - Additional Information (Detail) - GBP (£)
£ in Thousands
6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Disclosure of detailed information about intangible assets [line items]    
Intangible assets, carrying value £ 2,206 £ 2,198
Patents [member]    
Disclosure of detailed information about intangible assets [line items]    
Intangible assets, carrying value 2,200 £ 2,200
Intangible assets, acquired £ 100