RETIREMENT BENEFIT OBLIGATIONS (Details) - Schedule of Retirement Benefits Recognised in Balance Sheet - Amount Recognized [Member] - GBP (£) £ in Millions	Dec. 31, 2018	Dec. 31, 2017
RETIREMENT BENEFIT OBLIGATIONS (Details) - Schedule of Retirement Benefits Recognised in Balance Sheet [Line Items]
Retirement benefit assets	£ 1,267	£ 723
Retirement benefit obligations	(245)	(358)
Total amounts recognised in the balance sheet	£ 1,022	£ 365

The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2018-01-01
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- Definition

The amount of surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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-IssueDate 2018-01-01
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The amount of deficit in a defined benefit plan. [Refer: Defined benefit plans [member]]

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