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Asset transfers - Transferred assets continue to be recorded on Natwest Group's balance sheet (Details) - GBP (£) £ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |
Assets | £ 781,992 | £ 799,491 | £ 723,039
Mortgages - RoI |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |
Total | 1,314 | 2,091 |
Debt securities in issue |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |
Assets | 1,286 | 2,067 |
Debt securities in issue | Mortgages - RoI |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |
Assets | 1,244 | 1,921 |
Debt securities in issue | Cash deposits |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |
Assets | 42 | 146 |
Debt securities in issue held by third parties | Mortgages - RoI |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |
Assets |  | 243 |
Debt securities in issue held by the Group | Mortgages - RoI |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |
Assets | £ 1,314 | £ 1,848 |

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