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Trade and other payables - Summary of Trade and Other Payables, Amounts Falling Due After More Than One Year (Detail) - GBP (£)
£ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Trade and other non-current payables [abstract]      
Payments due to vendors (earnout agreements) [1] £ 100.3 £ 251.7  
Liabilities in respect of put option agreements with vendors [1] 128.8 188.6  
Fair value of derivatives [1] 21.2 14.2  
Other creditors and accruals [1] 199.3 355.5  
Trade and other payables [2] £ 449.6 [1] £ 810.0 [1] £ 911.7
[1] Figures have been restated to be in accordance with IAS 39 Financial Instruments: Recognition and Measurement, as described in the accounting policies.
[2] Figures have been restated, as described in the accounting policies.