v3.25.2
Goodwill and intangible assets (Details) - GBP (£)
£ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Disclosure of detailed information about intangible assets [line items]    
Goodwill and intangible assets [1] £ 259 £ 303
Other intangible assets    
Disclosure of detailed information about intangible assets [line items]    
Goodwill and intangible assets 259 303
Software | Internally generated    
Disclosure of detailed information about intangible assets [line items]    
Goodwill and intangible assets 255 296
Additions other than through business combinations, intangible assets other than goodwill 64 145
Reversal of impairment loss recognised in profit or loss, intangible assets other than goodwill 25  
Impairment loss recognised in profit or loss, intangible assets other than goodwill   4
Amortisation, intangible assets other than goodwill £ 141 £ 71
[1] Refer to Note 7 ‘Goodwill and intangible assets’ on page 45.