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Structured entities - Own asset securitisations (Details) - GBP (£) £ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Structured entities |  |
Loans and mortgages | £ 400,326 | £ 381,433
Assets pledged against liabilities | 33,769 | 39,156
Structured entities relating to other credit risk transfer securitisation |  |
Structured entities |  |
Loans and mortgages | 13,226 | 2,687
Reduction in expected credit losses from financial guarantee contracts with consolidated structured entities | 43 | 11
Structured entities relating to other credit risk transfer securitisation | Third parties |  |
Structured entities |  |
Debt securities in issue | 1,175 | 863
Structured entities relating to covered debt programme |  |
Structured entities |  |
Other borrowings | 2,305 | 3,619
Structured entities relating to covered debt programme | Loans to customers |  |
Structured entities |  |
Assets pledged against liabilities | 9,668 | 11,067
Structured entities relating to lending of own issued securities | Debt securities | Lending of own issued securities |  |
Structured entities |  |
Assets pledged against liabilities | 4,878 | 4,168
Structured entities relating to lending of own issued securities | Secured | Lending of own issued securities |  |
Structured entities |  |
Debt securities in issue | £ 4,715 | £ 4,062

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- Definition The amount of instruments issued by the entity that represent indebtedness. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + 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: Classes of contingent liabilities [domain]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 14 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_14_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of borrowings that the entity does not separately disclose in the same statement or note. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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