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Finance and investment income, finance costs and revaluation and retranslation of financial instruments (Tables)
 12 Months Ended
Dec. 31, 2024
Analysis of income and expense [abstract]  
Summary of Finance and Investment Income, Finance Costs and Revaluation and retranslation of Financial Instruments
Finance and investment income arise from:
202420232022
£m£m£m
Financial assets measured at amortised cost123 111 118 
Financial assets measured at fair value through profit and loss11 13 24 
Other interest income3 3 3 
137 127 145 
Finance costs arise from:
202420232022
£m£m£m
Interest on bank overdrafts, bonds and bank loans
309 273 258 
Interest expense related to lease liabilities98 106 96 
Interest on other long-term employee benefits6 6 3 
Net interest expense on pension plans4 4 2 
417 389 359 
Revaluation and retranslation of financial instruments include:
20242023
2022
£m£m£m
Movements in fair value of derivative financial instruments
(17)(3)1 
Premium on the early repayment of bonds(16)— — 
Revaluation of investments and other assets held at fair value through profit or loss
(24)(21)23 
Remeasurement of put options over non-controlling interests
(10)(1)28 
Revaluation of contingent consideration liabilities1 51 26 
Retranslation of financial instruments16 (19)(2)
Net revaluation and retranslation of financial instrument (loss)/gain
(50)7 76