v3.26.1
Share-based payments - Share options (Details)
12 Months Ended
Dec. 31, 2025
Options
£ / shares
Dec. 31, 2024
Options
£ / shares
Dec. 31, 2023
Options
£ / shares
2021 Incentive Plan      
Share-based payments      
Number of share options outstanding | Options 7,736,819 1,171,210 998,598
Weighted average exercise price (£) £ 1.42 £ 0.91 £ 1.2
Expected weighted average remaining vesting period (years) 2 years 11 months 23 days 2 years 1 month 20 days  
Number of options exercisable | Options 1,727,449 380,763  
2021 Incentive Plan | Maximum      
Share-based payments      
Exercise prices £ 8.92    
Exercise price of share options exercisable 8.92    
2021 Incentive Plan | Minimum      
Share-based payments      
Exercise prices 0    
Exercise price of share options exercisable £ 0    
2021 Incentive plan - Nil cost options      
Share-based payments      
Number of share options outstanding | Options 3,818,319 1,062,415  
2021 Incentive plan - Cost share options      
Share-based payments      
Number of share options outstanding | Options 3,432,330    
2021 Incentive plan - Performance options      
Share-based payments      
Number of share options outstanding | Options 377,500    
2021 Incentive plan - Compare Share Option Plan (CSOP)      
Share-based payments      
Number of share options outstanding | Options 108,670 108,795  
EMI Scheme      
Share-based payments      
Number of share options outstanding | Options 861,172 945,429 1,170,231
Weighted average exercise price (£) £ 1.8 £ 2.2 £ 2.5
Expected weighted average remaining vesting period (years) 6 months 11 months 1 day  
Number of options exercisable | Options 676,571 635,240  
Exercise prices £ 1.7    
EMI Scheme | Maximum      
Share-based payments      
Exercise prices   £ 11.49  
EMI Scheme | Minimum      
Share-based payments      
Exercise prices   £ 1.84