v3.26.1
Ordinary dividends (Details) - £ / shares
6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Interim period amount      
Disclosure of Dividends [line items]      
Dividends declared (pound per share) £ 0.075 £ 0.075  
Previous period final amount      
Disclosure of Dividends [line items]      
Dividends declared (pound per share)     £ 0.075