v3.26.1
Share capital and other reserves - Allotted, called up and fully paid shares (Details)
$ / shares in Units, $ in Millions
4 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
Sep. 05, 2025
USD ($)
$ / shares
Dec. 31, 2025
GBP (£)
$ / shares
shares
Dec. 31, 2025
GBP (£)
shares
Dec. 31, 2025
$ / shares
Sep. 30, 2025
GBP (£)
Sep. 05, 2025
GBP (£)
Dec. 31, 2024
GBP (£)
shares
Share capital and other reserves                
Number of shares allotted, called up and fully paid shares     101,602,621 101,602,621       69,542,515
Share capital | £     £ 79,328 £ 79,328       £ 54,753
Number of shares held in treasury     140,000 140,000       140,000
Number of shares issued       32,060,106        
At-the-market offering                
Share capital and other reserves                
Par value per share | $ / shares   $ 0.001            
Number of shares issued     3,000,000 2,986,768        
Aggregate offering price $ 100 $ 100       £ 74,000,000 £ 74,000,000  
Percentage of commission on gross proceeds 3.00% 3.00%            
At-the-market offering | Weighted average                
Share capital and other reserves                
Share issued price per share | $ / shares     £ 5.91          
Ordinary Share                
Share capital and other reserves                
Number of shares allotted, called up and fully paid shares     101,602,621 101,602,621       69,542,515
Share capital | £     £ 79,328 £ 79,328       £ 54,753
Par value per share | $ / shares         $ 0.001      
Number of shares authorized     1,000,000,000 1,000,000,000        
Number of shares issued       32,060,106