FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME (Details) - Schedule of Financial Assets At Fair Value Through Other Comprehensive Income - GBP (£) £ in Millions	Dec. 31, 2019	Dec. 31, 2018
Debt securities:
Government securities	£ 13,098	£ 18,971
Bank and building society certificates of deposit		118
Asset-backed securities:
Mortgage-backed securities	121	120
Other asset-backed securities	60	131
Corporate and other debt securities	11,051	5,151
	24,330	24,491
Treasury and other bills	535	303
Equity shares	227	21
Total financial assets at fair value through other comprehensive income	£ 25,092	£ 24,815

The amount of debt instruments held that are backed by underlying assets. [Refer: Debt instruments held]

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The amount of debt instruments held by the entity that were issued by a bank. [Refer: Debt instruments held]

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The amount of debt instruments held by the entity that were issued by a corporate entity. [Refer: Debt instruments held]

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The amount of instruments held by the entity that provide evidence of a residual interest in the assets of another entity after deducting all of its liabilities.

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The amount of financial assets at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets; Other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The amount of debt instruments held by the entity that were issued by a government. [Refer: Debt instruments held; Government [member]]

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The amount of debt instruments held by the entity that it does not separately disclose in the same statement or note. [Refer: Debt instruments held]

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An entity’s own equity instruments, held by the entity or other members of the consolidated group.

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