v3.25.0.1
Share-based payments - Movements in the number and weighted average exercise price of share options (Details)
 12 Months Ended
Dec. 31, 2024
Options
£ / shares
Dec. 31, 2023
Options
£ / shares
2021 Incentive Plan    
Share-based payments    
Outstanding, start of period 998,598 435,567
Granted during the period 397,803 737,060
Forfeited during the period (96,822) (71,577)
Exercised during the period (128,369) (102,452)
Outstanding, end of period 1,171,210 998,598
Weighted average exercise price, Outstanding, start of period | £ / shares £ 1.2  
Weighted average exercise price, Outstanding, end of period | £ / shares £ 0.91 £ 1.2
2021 Incentive plan - Compare Share Option Plan (CSOP)    
Share-based payments    
Outstanding, start of period 108,796  
Granted during the period 0  
Outstanding, end of period   108,796
Weighted average exercise price, Outstanding, start of period | £ / shares £ 9.8 £ 66.3
Weighted average exercise price, Granted during the period | £ / shares 9.8 9.8
Weighted average exercise price, Forfeited during the period | £ / shares 9.8 64.2
Weighted average exercise price, Outstanding, end of period | £ / shares £ 9.8 £ 9.8
EMI Scheme    
Share-based payments    
Outstanding, start of period 1,170,231 2,101,108
Forfeited during the period (224,802) (162,185)
Exercised during the period   (768,692)
Outstanding, end of period 945,429 1,170,231
Weighted average exercise price, Outstanding, start of period | £ / shares £ 2.5 £ 1.9
Weighted average exercise price, Forfeited during the period | £ / shares 3.8 2.4
Weighted average exercise price, Exercised during the period | £ / shares   1
Weighted average exercise price, Outstanding, end of period | £ / shares £ 2.2 £ 2.5