Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Summary of changes in stock options (Details)

v3.22.1
Summary of changes in stock options (Details)
12 Months Ended
Dec. 31, 2021
GBP (£)
shares
£ / shares
Dec. 31, 2020
GBP (£)
shares
£ / shares
Dec. 31, 2019
GBP (£)
shares
£ / shares
IfrsStatementLineItems [Line Items]      
Beginning Balance, Number of shares 5,329,230 4,966,740 4,221,050
Issue of Ordinary shares, Number of shares 465,490 823,190
Ending Balance, Number of shares 5,329,230 5,329,230 4,966,740
Ordinary share [member]      
IfrsStatementLineItems [Line Items]      
Beginning Balance, Number of shares 19,458,030 18,551,910  
Issue of ordinary shares, outstanding | £ £ 194,580 £ 185,519  
Par value per share | £ / shares £ 0.01 £ 0.01 £ 0.01
Issue of Ordinary shares, Number of shares 10 906,120  
Issue of Ordinary shares, Share capital | £ £ 9,061  
Issue of A Ordinary shares, Number of shares 89,560    
Issue of A Ordinary shares, Share capital | £ £ 896    
Ending Balance, Number of shares 19,547,600 19,458,030 18,551,910
Ending Balance, Share capital | £ £ 195,476 £ 194,580 £ 185,519
Ordinary Shares A [Member]      
IfrsStatementLineItems [Line Items]      
Par value per share | £ / shares £ 0.01 £ 0.01 £ 0.01