Accounting policies (Details) £ in Millions	12 Months Ended
Dec. 31, 2024 GBP (£) item
Intangible assets and goodwill
Impairment loss \| £	£ 0
Credit cards
Loan impairment provisions
Write off period	4 years
Number of arrear cycles after which the financial asset is written off \| item	12
Minimum \| Computer software
Intangible assets and goodwill
Estimated useful economic lives	3 years
Minimum \| Other acquired intangibles
Intangible assets and goodwill
Estimated useful economic lives	3 years
Maximum \| Retail mortgages
Loan impairment provisions
Write off period	5 years
Maximum \| Overdrafts and other unsecured loans
Loan impairment provisions
Write off period	6 years
Maximum \| Commercial loans
Loan impairment provisions
Write off period	5 years
Maximum \| Computer software
Intangible assets and goodwill
Estimated useful economic lives	10 years
Maximum \| Other acquired intangibles
Intangible assets and goodwill
Estimated useful economic lives	5 years

The amount of impairment loss recognised in profit or loss. [Refer: Impairment loss; Profit (loss)]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The useful life, measured as period of time, used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The typical time frames from initial impairment to write off.

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