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TAXATION (Details) - Schedule of Income Tax Charges - GBP (£)
£ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Schedule of Income Tax Charges [Abstract]      
Tax (expense) credit attributable to policyholders £ 14 £ (82) £ (301)
Shareholder tax expense (1,574) (1,646) (1,423)
Tax expense £ (1,560) £ (1,728) £ (1,724)