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Taxation - Tax Charge (Detail) - GBP (£) £ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Corporation tax |  |  |
Current year | £ 423.0 | £ 404.2 | £ 383.0
Prior years | (63.4) | (108.1) | (97.2)
Corporation tax | 359.6 | 296.1 | 285.8
Deferred tax |  |  |
Current year | (78.3) | (41.5) | (207.4)
Prior years | (6.3) | 1.4 | 4.6
Deferred tax | (84.6) | (40.1) | (202.8)
Tax charge | £ 275.0 | £ 256.0 | £ 83.0

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