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Analysis of cash and cash equivalents (Details) € in Millions, £ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 GBP (£) | Dec. 31, 2021 GBP (£) | Dec. 31, 2020 GBP (£) | Dec. 31, 2022 EUR (€) | Dec. 31, 2021 EUR (€) | Dec. 31, 2020 EUR (€)
Analysis of cash and cash equivalents |  |  |  |  |  |
Cash and cash equivalents at beginning of period | £ 190,706 | £ 139,199 | £ 100,588 |  |  |
Net (decrease)/increase in cash and cash equivalents | (32,257) | 51,507 | 38,611 |  |  |
Cash and cash equivalents at end of period | 158,449 | 190,706 | 139,199 |  |  |
Cash and balances at central banks | 144,832 | 177,757 | 124,489 |  |  |
Trading assets | 8,551 | 7,137 | 9,220 |  |  |
Other financial assets | 19 | 16 | 173 |  |  |
Loans to banks | 5,047 | 5,796 | 5,317 |  |  |
Total cash and cash equivalents | 158,449 | 190,706 | 139,199 |  |  |
Cash collateral posted with bank counterparties | 4,895 | 4,293 | 7,592 |  |  |
NWM N.V. |  |  |  |  |  |
Cash |  |  |  |  |  |
Mandatory reserve deposits at central banks | € |  |  |  | € 64 | € 60 | € 81
Royal Bank of Scotland International (Holdings) Limited |  |  |  |  |  |
Cash |  |  |  |  |  |
Mandatory reserve deposits at central banks | £ 108 | £ 123 | £ 59 |  |  |

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- Definition The amount of cash and bank balances held at central banks. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_45&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2022-03-24 -Paragraph B13 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2022-en-r&anchor=para_B13_a&doctype=Appendix&subtype=B -URIDate 2022-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 54 -Subparagraph i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_54_i&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The increase (decrease) in cash and cash equivalents after the effect of exchange rate changes on cash and cash equivalents held in foreign currencies. [Refer: Cash and cash equivalents; Effect of exchange rate changes on cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_45&doctype=Standard -URIDate 2022-03-24 + Details
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