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Derivatives - Analysis of cash flow reserve and foreign exchange reserve (Details) - GBP (£) £ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Derivatives |  |  |
Pre-tax cash flow hedge reserve | £ (2,629) | £ (3,837) |
Pre-tax foreign exchange hedge reserve | (789) | (965) |
Amount recognised in equity, cash flow hedges | 187 | (2,973) | £ (687)
Amount recognised in equity, foreign exchange hedge reserve | 107 | (266) | £ 88
Amount transferred from equity to earnings, cash flow hedge reserve | 1,021 | (304) |
Amount transferred from equity to earnings, foreign exchange hedge reserve | 69 | 7 |
Interest rate risk |  |  |
Derivatives |  |  |
Continuing cash flow hedge reserve | (2,330) | (3,576) |
De-designated cash flow hedge reserve | (304) | (297) |
Amount recognised in equity, cash flow hedges | 137 | (2,997) |
Amount recognised in equity, foreign exchange hedge reserve |  | (64) |
Amount transferred from equity to earnings, cash flow hedge reserve | (10) | (21) |
Interest rate risk | Net interest income |  |  |
Derivatives |  |  |
Amount transferred from equity to earnings, cash flow hedge reserve | 1,112 | (252) |
Interest rate risk | Non interest income |  |  |
Derivatives |  |  |
Amount transferred from equity to earnings, cash flow hedge reserve | (10) | (21) |
Interest rate risk | Operating expenses |  |  |
Derivatives |  |  |
Amount transferred from equity to earnings, cash flow hedge reserve |  | (14) |
Exchange rate risk |  |  |
Derivatives |  |  |
Continuing cash flow hedge reserve | 1 | 16 |
Continuing foreign exchange hedge reserve | (18) | (85) |
De-designated cash flow hedge reserve | 4 | 20 |
De-designated foreign exchange hedge reserve | (771) | (880) |
Amount recognised in equity, cash flow hedges | 50 | 24 |
Amount recognised in equity, foreign exchange hedge reserve | 107 | (202) |
Exchange rate risk | Net interest income |  |  |
Derivatives |  |  |
Amount transferred from equity to earnings, cash flow hedge reserve | (74) | (29) |
Exchange rate risk | Non interest income |  |  |
Derivatives |  |  |
Amount transferred from equity to earnings, cash flow hedge reserve | (9) | 15 |
Amount transferred from equity to earnings, foreign exchange hedge reserve | 69 | 7 |
Exchange rate risk | Operating expenses |  |  |
Derivatives |  |  |
Amount transferred from equity to earnings, cash flow hedge reserve | £ 2 | £ (3) |

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- Definition The gains (losses) recognised in other comprehensive income on cash flow hedges, before tax, before reclassification adjustments. [Refer: Cash flow hedges [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 91 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_91_b&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The gains (losses) recognised in other comprehensive income on hedges of net investments in foreign operations, before tax, before reclassification adjustments. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 39 -IssueDate 2023-01-01 -Paragraph 102 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=39&code=ifrs-tx-2023-en-r&anchor=para_102_a&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 91 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_91_b&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 9 -IssueDate 2023-01-01 -Paragraph 6.5.13 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2023-en-r&anchor=para_6.5.13_a&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of reclassification adjustments related to hedges of net investments in foreign operations, before tax. Reclassification adjustments are amounts reclassified to profit (loss) in the current period that were recognised in other comprehensive income in the current or previous periods. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 39 -IssueDate 2023-01-01 -Paragraph 102 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=39&code=ifrs-tx-2023-en-r&anchor=para_102&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 9 -IssueDate 2023-01-01 -Paragraph 6.5.14 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2023-en-r&anchor=para_6.5.14&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 92 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_92&doctype=Standard -URIDate 2023-03-23 + Details
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