Annual report pursuant to Section 13 and 15(d)

Share based compensation - Option Activity (Details)

v3.22.0.1
Share based compensation - Option Activity (Details)
£ / shares in Units, £ in Thousands
12 Months Ended
Dec. 31, 2021
GBP (£)
£ / shares
shares
Dec. 31, 2021
GBP (£)
£ / shares
$ / shares
shares
Dec. 31, 2020
GBP (£)
£ / shares
shares
Dec. 31, 2020
GBP (£)
$ / shares
shares
Dec. 31, 2019
shares
Dec. 31, 2021
$ / shares
Options            
Exercised (in shares) (5,723,646) (5,723,646) (11,401,390) (11,401,390) (3,549,298)  
Stock options            
Options            
Outstanding at the beginning of the period (in shares) 91,643,184 91,643,184        
Granted (in shares) 39,066,776 39,066,776        
Exercised (in shares) (5,723,646) (5,723,646)        
Expired (in shares) (4,866,762) (4,866,762)        
Forfeited (in shares) (5,204,114) (5,204,114)        
Outstanding at the end of the period (in shares) 114,915,438 114,915,438 91,643,184 91,643,184    
Weighted Average Exercise Price Per Option            
Outstanding at the beginning of the period (in dollars per share) | £ / shares £ 0.55          
Granted (in dollars per share) | £ / shares 0.38          
Exercise price (in dollars per share) | £ / shares 0.10          
Expired (in dollars per share) | £ / shares 0.79          
Forfeited (in dollars per share) | £ / shares 0.26          
Outstanding at the end of the period (in dollars per share) | £ / shares £ 0.52   £ 0.55      
Additional disclosures            
Outstanding - Average Remaining Contractual Term (Years) 7 years 7 years        
Outstanding - Aggregate Intrinsic Value | £ £ 14,030 £ 14,030        
Exercisable - Options 60,058,450 60,058,450        
Exercisable - Weighted Average Exercise Price Per Option | £ / shares £ 0.66 £ 0.66        
Exercisable - Average Remaining Contractual Term (Years) 5 years 6 months 5 years 6 months        
Exercisable - Aggregate Intrinsic Value | £ £ 2,478 £ 2,478        
Options granted on market value at grant date            
Options            
Outstanding at the beginning of the period (in shares) 75,525,482 75,525,482        
Granted (in shares) 21,300,998 21,300,998 15,595,374 15,595,374 15,679,383  
Exercised (in shares) (2,659,632) (2,659,632)        
Expired (in shares) (4,844,367) (4,844,367)        
Forfeited (in shares) (1,935,167) (1,935,167)        
Outstanding at the end of the period (in shares) 87,387,314 87,387,314 75,525,482 75,525,482    
Weighted Average Exercise Price Per Option            
Outstanding at the beginning of the period (in dollars per share) | $ / shares   £ 0.67        
Granted (in dollars per share) | $ / shares   0.70        
Exercise price (in dollars per share) | $ / shares   0.21        
Expired (in dollars per share) | $ / shares   0.80        
Forfeited (in dollars per share) | $ / shares   0.71        
Outstanding at the end of the period (in dollars per share) | $ / shares   £ 0.68   $ 0.67    
Additional disclosures            
Outstanding - Average Remaining Contractual Term (Years) 6 years 7 months 6 days 6 years 7 months 6 days        
Outstanding - Aggregate Intrinsic Value | £ £ 1,311 £ 1,311        
Exercisable - Options 57,005,097 57,005,097        
Exercisable - Weighted Average Exercise Price Per Option | $ / shares           $ 0.69
Exercisable - Average Remaining Contractual Term (Years) 5 years 4 months 24 days 5 years 4 months 24 days        
Exercisable - Aggregate Intrinsic Value | £ £ 1,068 £ 1,068        
Options with nominal exercise price            
Options            
Outstanding at the beginning of the period (in shares)            
Outstanding at the end of the period (in shares) 27,528,124 27,528,124        
Additional disclosures            
Exercisable - Options 3,053,353 3,053,353        
RSU            
Options            
Outstanding at the beginning of the period (in shares) 16,117,702 16,117,702        
Granted (in shares) 17,765,778 17,765,778        
Exercised (in shares) (3,064,014) (3,064,014)        
Expired (in shares) (22,395) (22,395)        
Forfeited (in shares) (3,268,947) (3,268,947)        
Outstanding at the end of the period (in shares)     16,117,702 16,117,702    
Additional disclosures            
Outstanding - Average Remaining Contractual Term (Years) 8 years 6 months 8 years 6 months 8 years 4 months 24 days 8 years 4 months 24 days    
Outstanding - Aggregate Intrinsic Value | £ £ 12,720 £ 12,720 £ 10,616 $ 10,616    
Exercisable - Average Remaining Contractual Term (Years) 6 years 10 months 24 days 6 years 10 months 24 days        
Exercisable - Aggregate Intrinsic Value | £ £ 1,411 £ 1,411