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Financial Instruments - fair value - Analysis of Financial Instruments Measured at Fair Value (Details) - At Fair Value - Level 3
£ in Millions
6 Months Ended
Jun. 30, 2025
GBP (£)
Contingent consideration liabilities  
Contingent consideration liabilities  
Beginning balance £ (133)
Losses recognised in the income statement (3)
Losses recognised in other comprehensive income 0
Exchange adjustments 2
Transfers 31
Additions 0
Settlements 15
Ending balance (88)
Other investments | Other investments  
Contingent consideration liabilities  
Transfers 0
Other investments  
Beginning balance 322
Losses recognised in the income statement (15)
Losses recognised in other comprehensive income (9)
Exchange adjustments (20)
Additions 6
Settlements 0
Ending balance £ 284