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

Share-based compensation - Share options granted (Details)

v3.22.2.2
Share-based compensation - Share options granted (Details)
12 Months Ended
Sep. 30, 2022
Options
£ / shares
Sep. 30, 2022
Options
$ / shares
Sep. 30, 2021
Options
£ / shares
Sep. 30, 2020
Options
£ / shares
Share-based compensation        
Outstanding at beginning of period (in shares)     8,451,872  
Outstanding at beginning of period (in shares) 183,497 183,497 161,250 72,700
Granted during the period (in shares)     55,210 88,550
Forfeited/lapsed during the period (in shares) (447,058) (447,058) (32,963)  
Outstanding at end of period (in shares) 8,004,813 8,004,813 183,497 161,250
Exercisable at end of period (in shares) 1,253,062 1,253,062 17,167  
Outstanding at beginning of period (in dollars per share) | £ / shares £ 0.0001   £ 0.0001 £ 0.0001
Granted during the period (in dollars per share) | £ / shares     0.0001 0.0001
Forfeited/lapsed during the period (in dollars per share) | £ / shares 0.0001   0.0001  
Outstanding at end of period (in dollars per share) | (per share) £ 0.0001 $ 0.0001 £ 0.0001 £ 0.0001