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Asset transfers (Details) - Securities repurchase agreements or lending transactions - GBP (£) £ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Securities repurchase agreements or lending transactions |  |
Fair value of transferred financial asset not derecognised | £ 26,705 | £ 32,112
Fair value of associated liabilities | 24,747 | 31,932
Trading assets |  |
Securities repurchase agreements or lending transactions |  |
Fair value of transferred financial asset not derecognised | 13,084 | 20,526
Loans to banks - amortised cost. |  |
Securities repurchase agreements or lending transactions |  |
Fair value of transferred financial asset not derecognised | 38 | 5
Loans to customers - amortised cost. |  |
Securities repurchase agreements or lending transactions |  |
Fair value of transferred financial asset not derecognised | 1,837 | 39
Financial assets (Other) |  |
Securities repurchase agreements or lending transactions |  |
Fair value of transferred financial asset not derecognised | £ 11,746 | £ 11,542

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- Definition The fair value of financial liabilities associated with transferred financial assets that are not derecognised in their entirety. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 42D -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_42D_d&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The fair value of transferred financial assets that are not derecognised in their entirety. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 42D -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_42D_d&doctype=Standard -URIDate 2021-03-24 + Details
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