The increase (decrease) in the fair value of a financial liability that is attributable to changes in the credit risk of that liability. [Refer: Credit risk [member]]

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The amount of derivative financial liabilities held for hedging. [Refer: Derivative financial liabilities]

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The amount of receivables related to finance leases.

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The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Classes of financial instruments [domain]; Financial assets; Derivatives [member]]

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The amount of items that have been transmitted to but not yet received and processed by other banks.

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The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

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The amount of a present obligation of the entity to transfer an economic resource as a result of past events. Economic resource is a right that has the potential to produce economic benefits.

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Financial instruments - classification - Liabilities (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financial instruments
Liabilities	£ 668,607	£ 655,485	£ 683,557
Lease liabilities	630	670
Bank deposits
Financial instruments
Liabilities	31,452	22,190
Financial Liabilities	31,452	22,190
Items in course of transmission to other banks	136	92
Customer deposits
Financial instruments
Liabilities	433,490	431,377
Settlement balances
Financial instruments
Liabilities	1,729	6,645
Trading liabilities
Financial instruments
Liabilities	54,714	53,636
Financial Liabilities	54,714	53,636
Derivatives
Financial instruments
Liabilities	72,082	72,395
Financial Liabilities	72,082	72,395
Net hedging derivative liabilities	464	270
Other financial liabilities
Financial instruments
Liabilities	61,087	55,089
Financial Liabilities	61,087	55,089
Subordinated liabilities
Financial instruments
Liabilities		5,714
Financial Liabilities	6,136	5,714
Notes in circulation
Financial instruments
Liabilities	3,316	3,237
Financial Liabilities	3,316	3,237
Other Financial liabilities
Financial instruments
Liabilities	4,601	5,202
Loans to customers - amortised cost
Financial instruments
Finance lease receivable	8,998	8,731
Other liabilities
Financial instruments
Liabilities	3,917	4,454
Other liabilities \| Other Financial liabilities
Financial instruments
Liabilities	3,917	4,454
Held-for-trading
Financial instruments
Liabilities	126,796	126,031
Financial Liabilities	126,300	125,800
Held-for-trading \| Trading liabilities
Financial instruments
Liabilities	54,714	53,636
Held-for-trading \| Derivatives
Financial instruments
Liabilities	72,082	72,395
DFV
Financial instruments
Liabilities	3,782	3,125
DFV \| Other financial liabilities
Financial instruments
Liabilities	3,548	2,888
Increase (decrease) in fair value of financial liability, attributable to changes in credit risk of liability	0
DFV \| Subordinated liabilities
Financial instruments
Liabilities	234	237
Amortised cost
Financial instruments
Liabilities	534,112	521,875
Lease liabilities	630	670
Amortised cost \| Bank deposits
Financial instruments
Liabilities	31,452	22,190
Financial Liabilities	31,500	22,200
Amortised cost \| Customer deposits
Financial instruments
Liabilities	433,490	431,377
Financial Liabilities	433,500	431,400
Amortised cost \| Settlement balances
Financial instruments
Liabilities	1,729	6,645
Financial Liabilities	1,700	6,600
Amortised cost \| Other financial liabilities
Financial instruments
Liabilities	57,539	52,201
Amortised cost \| Subordinated liabilities
Financial instruments
Liabilities	5,902	5,477
Financial Liabilities	5,900	5,500
Amortised cost \| Notes in circulation
Financial instruments
Liabilities	3,316	3,237
Financial Liabilities	3,300	3,200
Amortised cost \| Other Financial liabilities
Financial instruments
Liabilities	£ 684	£ 748