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Trade and other receivables - Summary of Trade and Other Receivables, Amounts Falling Due After More Than One Year (Detail) - GBP (£)
£ in Millions
Dec. 31, 2019
Dec. 31, 2018
Trade and other non-current receivables [abstract]    
Prepayments £ 2.2 £ 3.0
Accrued income   16.5
Fair value of derivatives   8.4
Other debtors 135.4 152.1
Trade and other receivables £ 137.6 £ 180.0