v3.26.1
Share-based payments - Movements in the number and weighted average exercise price of share options (Details)
6 Months Ended 12 Months Ended
Jun. 30, 2026
Options
£ / shares
Dec. 31, 2025
Options
£ / shares
2021 Incentive Plan    
Share-based payments    
Outstanding, start of year | Options 7,736,819 1,171,210
Granted during the year | Options 2,567,620 7,254,116
Exercised during the year | Options (81,628) (546,886)
Forfeited during the year | Options (1,624,360) (141,621)
Outstanding, end of year | Options 8,598,451 7,736,819
Weighted average exercise price, Outstanding, start of year | £ / shares £ 1.42 £ 0.91
Weighted average exercise price, Granted during the year | £ / shares 1.95 1.41
Weighted average exercise price, Exercised during the year | £ / shares   0.62
Weighted average exercise price, Forfeited during the year | £ / shares 0.42  
Weighted average exercise price, Outstanding, end of year | £ / shares £ 1.7 £ 1.42
EMI Scheme    
Share-based payments    
Outstanding, start of year | Options 861,172 945,429
Exercised during the year | Options (18,309) (57,181)
Forfeited during the year | Options (5,161) (27,076)
Outstanding, end of year | Options 837,702 861,172
Weighted average exercise price, Outstanding, start of year | £ / shares £ 1.8 £ 2.2
Weighted average exercise price, Exercised during the year | £ / shares 1.8 8.7
Weighted average exercise price, Forfeited during the year | £ / shares 1.8 1.8
Weighted average exercise price, Outstanding, end of year | £ / shares £ 1.8 £ 1.8