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FINANCE AND INVESTMENT INCOME, FINANCE COSTS AND REVALUATION AND RETRANSLATION OF FINANCIAL INSTRUMENTS (Tables)
 12 Months Ended
Dec. 31, 2025
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:
202520242023
£m£m£m
Financial assets measured at amortised cost62 123 111 
Financial assets measured at fair value through profit and loss13 11 13 
Other interest income3 3 3 
78 137 127 
Finance costs arise from:
202520242023
£m£m£m
Interest on bank overdrafts, bonds and bank loans
245 309 273 
Interest expense related to lease liabilities98 98 106 
Interest on other long-term employee benefits5 6 6 
Net interest expense on pension plans4 4 4 
352 417 389 
Revaluation and retranslation of financial instruments include:
20252024
2023
£m£m£m
Movements in fair value of derivative financial instruments
22 (17)(3)
Premium on the early repayment of bonds— (16)— 
Revaluation of investments and other assets held at fair value through profit or loss
4 (24)(21)
Remeasurement of put options over non-controlling interests
(7)(10)(1)
Revaluation of contingent consideration liabilities1 1 51 
Retranslation of financial instruments(36)16 (19)
Net revaluation and retranslation of financial instrument (loss)/gain
(16)(50)7