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Financial instruments - classification - Reclassification of mortgages from amortised cost to fair value through profit or loss (Details) - GBP (£) £ in Millions | 12 Months Ended |
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Dec. 31, 2022 | Dec. 31, 2021
MFVTPL |  |
Reclassification of mortgages from amortised cost to fair value through profit or loss |  |
Financial assets | £ 145,800 | £ 165,600
Financial assets that have been reclassified from amortised cost to fair value at profit or loss |  |
Reclassification of mortgages from amortised cost to fair value through profit or loss |  |
Change in value | (274) |
Financial assets that have been reclassified from amortised cost to fair value at profit or loss | Amortised cost |  |
Reclassification of mortgages from amortised cost to fair value through profit or loss |  |
Amounts reclassified on balance sheet | 11,263 |
Financial assets that have been reclassified from amortised cost to fair value at profit or loss | MFVTPL |  |
Reclassification of mortgages from amortised cost to fair value through profit or loss |  |
Amounts reclassified on balance sheet | 10,989 |
Loans to customers - amortised cost |  |
Reclassification of mortgages from amortised cost to fair value through profit or loss |  |
Change in value | 19 |
Loans to customers - amortised cost | Amortised cost |  |
Reclassification of mortgages from amortised cost to fair value through profit or loss |  |
Amounts reclassified on balance sheet | 587 |
Loans to customers - amortised cost | MFVTPL |  |
Reclassification of mortgages from amortised cost to fair value through profit or loss |  |
Amounts reclassified on balance sheet | 606 |
Assets of disposal groups |  |
Reclassification of mortgages from amortised cost to fair value through profit or loss |  |
Change in value | (293) |
Assets of disposal groups | Amortised cost |  |
Reclassification of mortgages from amortised cost to fair value through profit or loss |  |
Amounts reclassified on balance sheet | 10,676 |
Assets of disposal groups | MFVTPL |  |
Reclassification of mortgages from amortised cost to fair value through profit or loss |  |
Amounts reclassified on balance sheet | £ 10,383 |

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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) 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 receive 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 the entity’s own equity instruments do not include puttable financial instruments 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. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35H&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35M&doctype=Standard -URIDate 2022-03-24 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35N&doctype=Standard -URIDate 2022-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35I&doctype=Standard -URIDate 2022-03-24 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_25&doctype=Standard -URIDate 2022-03-24 + Details
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