v3.26.1
Financial risk management and impairment of financial assets - Credit risk and impairment (Details)
£ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2025
GBP (£)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
GBP (£)
Financial risk management and impairment of financial assets        
Restricted cash £ 1,224     £ 1,700
January 2025 offering        
Financial risk management and impairment of financial assets        
Net proceeds from issue of shares and warrants 67,200 $ 83,900    
July 2025 Offering        
Financial risk management and impairment of financial assets        
Net proceeds from issue of shares and warrants 49,000 66,400    
At-the-market offering        
Financial risk management and impairment of financial assets        
Net proceeds from issue of shares and warrants 13,000 $ 17,100    
Credit risk        
Financial risk management and impairment of financial assets        
Restricted cash 1,224     1,700
Maximum exposure to credit risk 323     634
Credit risk | Trade receivables | Accumulated impairment        
Financial risk management and impairment of financial assets        
loss allowance £ 0     £ 0
Currency risk | USD        
Financial risk management and impairment of financial assets        
Reasonably possible decrease in risk assumption 2.00% 2.00%    
Increase (decrease) in profit (loss) from reasonably possible decrease in risk assumption £ 7,470      
Increase (decrease) in other comprehensive income (loss) from reasonably possible decrease in risk assumption £ 3,842      
Balances with banks | $     $ 23,227