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Financial instruments: valuation - Movement in Level 3 portfolios - Assets (Details) - GBP (£) £ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Trading assets |  |
Movement in level 3 assets |  |
Financial assets | £ 45,551 | £ 45,577
Derivatives |  |
Movement in level 3 assets |  |
Financial assets | 78,904 | 99,545
Recurring fair value measurement |  |
Movement in level 3 assets |  |
Financial assets at beginning of period | 162,882 |
Financial assets at end of period | 153,862 | 162,882
Recurring fair value measurement | Level 3 |  |
Movement in level 3 assets |  |
Financial assets at beginning of period | 2,333 | 2,052
Amounts recorded in the income statement | (243) | 143
Amount recorded in the statement of comprehensive income | 32 | (20)
Level 3 transfers in | 37 | 726
Level 3 transfers out | (227) | (337)
Purchases/Originations | 463 | 814
Settlements/Other decreases | (164) | (115)
Sales | (254) | (958)
Foreign exchange and other adjustments | (16) | 28
Financial assets at end of period | 1,961 | 2,333
Amounts recorded in the income statement in respect of balances held at period end - unrealised |  | 141
Recurring fair value measurement | Level 3 | Derivatives |  |
Movement in level 3 assets |  |
Financial assets at beginning of period | 1,007 | 918
Amounts recorded in the income statement | (156) | 126
Amount recorded in the statement of comprehensive income | 0 |
Level 3 transfers in | 6 | 193
Level 3 transfers out | (5) | (122)
Purchases/Originations | 180 | 355
Settlements/Other decreases | (70) | (40)
Sales | (137) | (423)
Foreign exchange and other adjustments | (2) |
Financial assets at end of period | 823 | 1,007
Amounts recorded in the income statement in respect of balances held at period end - unrealised | 67 | 126
Recurring fair value measurement | Level 3 | Other trading assets |  |
Movement in level 3 assets |  |
Financial assets at beginning of period | 396 | 740
Amounts recorded in the income statement | (88) | 31
Amount recorded in the statement of comprehensive income | 0 |
Level 3 transfers in | 15 | 1
Level 3 transfers out | (32) | (147)
Purchases/Originations | 8 | 274
Settlements/Other decreases | (8) | (75)
Sales | (65) | (434)
Foreign exchange and other adjustments | (3) | 6
Financial assets at end of period | 223 | 396
Amounts recorded in the income statement in respect of balances held at period end - unrealised | (39) | 31
Recurring fair value measurement | Level 3 | Other financial assets |  |
Movement in level 3 assets |  |
Financial assets at beginning of period | 930 | 394
Amounts recorded in the income statement | 1 | (14)
Amount recorded in the statement of comprehensive income | 32 | (20)
Level 3 transfers in | 16 | 532
Level 3 transfers out | (190) | (68)
Purchases/Originations | 275 | 185
Settlements/Other decreases | (86) |
Sales | (52) | (101)
Foreign exchange and other adjustments | (11) | 22
Financial assets at end of period | 915 | 930
Amounts recorded in the income statement in respect of balances held at period end - unrealised | 1 | £ (16)
Recurring fair value measurement | Level 3 | Financial liabilities, class [member] |  |
Movement in level 3 assets |  |
Amounts recorded in the income statement in respect of balances held at period end - unrealised | £ 29 |

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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 2023-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_25&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35H&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35M&doctype=Standard -URIDate 2023-03-23 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35N&doctype=Standard -URIDate 2023-03-23 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35I&doctype=Standard -URIDate 2023-03-23 + Details
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