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

Share-based compensation - Additional information (Details)

v3.22.2.2
Share-based compensation - Additional information (Details)
12 Months Ended
Sep. 30, 2022
USD ($)
£ / shares
Sep. 30, 2022
USD ($)
$ / shares
Sep. 30, 2021
£ / shares
Sep. 30, 2020
£ / shares
Sep. 30, 2019
£ / shares
Share-based compensation          
Weighted average exercise price | (per share) £ 0.0001 $ 0.0001 £ 0.0001 £ 0.0001 £ 0.0001
Weighted average remaining contractual life 3 years        
Options To Ordinary Shares Conversion Ratio 46.06 46.06