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Asset transfers - Assets pledged as collateral (Details) - GBP (£) £ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Asset transfers |  |
Assets pledged against liabilities | £ 35,972 | £ 47,395
Loans to customers and debt instruments transferred to provide collateral for issue of debt | 8,156 | 8,965
Debt securities and other borrowings issued for which collateral is provided by transferred assets | 4,132 | 3,512
Trading assets |  |
Asset transfers |  |
Assets pledged against liabilities | 15,062 | 23,601
Loans to banks - amortised cost |  |
Asset transfers |  |
Assets pledged against liabilities | 66 | 62
Loans to customers - amortised cost |  |
Asset transfers |  |
Assets pledged against liabilities | 17,493 | 20,108
Other financial assets |  |
Asset transfers |  |
Assets pledged against liabilities | £ 3,351 | £ 3,624

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of financial assets that the entity has pledged as collateral for liabilities or contingent liabilities, including amounts that have been reclassified in accordance with paragraph 3.2.23(a) of IFRS 9. [Refer: Contingent liabilities [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 14 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_14_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Debt securities and other borrowings issued for which collateral is provided by transferred assets + References No definition available. + Details
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- Definition The amount of loans to customers and debt instruments transferred to provide collateral for issue of debt + References No definition available. + Details
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