v3.26.1
Dividends (Details)
3 Months Ended 6 Months Ended
Sep. 18, 2026
$ / shares
Sep. 04, 2026
day
Jun. 30, 2026
$ / shares
Jun. 30, 2026
£ / shares
Jun. 30, 2025
$ / shares
Jun. 30, 2025
£ / shares
Jun. 30, 2026
$ / shares
Jun. 30, 2026
£ / shares
Jun. 30, 2025
$ / shares
Jun. 30, 2025
£ / shares
Disclosure of classes of share capital [line items]                    
Dividends paid, ordinary shares per share | (per share)     $ 0.08320 £ 0.06184 $ 0.08000 £ 0.05899 $ 0.16640 £ 0.12410 $ 0.16000 £ 0.12075
Dividends Proposed Or Declared, Average Of Market Exchange Rates, Number Of Days | day   3                
Ordinary shares [member]                    
Disclosure of classes of share capital [line items]                    
Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share $ 0.08660                  
ADS [Member]                    
Disclosure of classes of share capital [line items]                    
Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share $ 0.5196                  
Dividends paid, ordinary shares per share     $ 0.4992   $ 0.4800   $ 0.9984   $ 0.9600