v3.25.2
Critical accounting judgements and key sources of estimation uncertainty (Details)
$ / shares in Units, £ in Thousands, shares in Millions, $ in Millions
6 Months Ended
May 27, 2025
D
Jan. 24, 2025
USD ($)
D
$ / shares
shares
Jun. 30, 2025
GBP (£)
Dec. 31, 2024
$ / shares
Critical accounting judgements and key sources of estimation uncertainty        
Proceeds from issuing shares | £     £ 44,214  
Share Price   $ 5.6    
First half of principal amount | Convertible senior secured notes        
Critical accounting judgements and key sources of estimation uncertainty        
Conversion price (Per share price)       $ 2.75
Tranche A Warrant        
Critical accounting judgements and key sources of estimation uncertainty        
Number of days volume weighted average calculated | D 10 10    
Minimum percentage of warrant exercise price 103.00% 103.00%    
Warrants expiration period   5 years    
Measurement term of share price after public disclosure of successful wing-borne flight to determine warrants expiration 30 days 30 days    
Exercise price per share   $ 6    
Value per warrant   $ 2.29    
Tranche B Warrant        
Critical accounting judgements and key sources of estimation uncertainty        
Warrants expiration period   5 years    
Exercise price per share   $ 7.5    
Value per warrant   $ 3.61    
Underwritten public offering        
Critical accounting judgements and key sources of estimation uncertainty        
Number of shares issued | shares   15.0    
Gross Proceeds | $   $ 90    
Proceeds from issuing shares | £     £ 44,203  
Underwritten public offering | Tranche A Warrant        
Critical accounting judgements and key sources of estimation uncertainty        
Number of warrants issued | shares   7.5    
Underwritten public offering | Tranche B Warrant        
Critical accounting judgements and key sources of estimation uncertainty        
Number of warrants issued | shares   7.5    
Maximum | Tranche A Warrant        
Critical accounting judgements and key sources of estimation uncertainty        
Warrants expiration period   5 years