v3.26.1
Share Capital and Share Premium - Summary of Share Capital and Share Premium (Parenthetical) (Detail) - £ / shares
Jun. 30, 2026
Jun. 08, 2026
Dec. 31, 2025
Ordinary shares [member]      
Disclosure of classes of share capital [line items]      
Par value per share £ 0.000004 £ 0.0004 £ 0.0004