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Organization and nature of business (Details)
 1 Months Ended 6 Months Ended
Feb. 05, 2021
GBP (£)
Feb. 05, 2021
USD ($)
Jul. 31, 2022
GBP (£)
Jul. 31, 2022
USD ($)
Jun. 30, 2023
ClinicalStageProgram
General information [Abstract]          
Number of clinical stage programs | ClinicalStageProgram         4
Ordinary shares [member]          
General information [Abstract]          
Proceeds from shares issued     £ 116,812,000 $ 140,000,000  
Offering expenses | £     £ 388,000    
IPO [Member]          
General information [Abstract]          
Proceeds from shares issued £ 210,985,000 $ 286,887,000