v3.25.4

Measurement basis of financial assets and liabilities - Schedule of Offsetting of Financial Assets and Liabilities (Details) - GBP (£) £ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Derivative assets | £ (19,727) | £ (24,065)
Derivative liabilities | (16,132) | (21,676)
Reverse repurchase agreements held at fair value | (50,986) | (49,476)
Repurchase agreements held at fair value | (38,570) | (37,760)
Net position | (105,681) | (100,515)
Net position | (553,672) | (531,777)
Gross amounts of assets and liabilities £m |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Derivative assets | (52,332) | (60,118)
Derivative liabilities | (50,775) | (60,150)
Net position | 1,557 | (32)
Net position | (829) | (98)
Gross amounts of assets and liabilities £m | Financial liabilities at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | (43,304) | (35,561)
Gross amounts of assets and liabilities £m | Financial liabilities at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | (51,345) | (48,566)
Gross amounts of assets and liabilities £m | Financial assets at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | (42,475) | (35,463)
Gross amounts of assets and liabilities £m | Financial assets at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | (63,862) | (60,282)
Net position | (12,517) | (11,716)
Amount offset in the balance sheet2 £m |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Derivative assets | (32,605) | (36,053)
Derivative liabilities | 34,643 | 38,474
Net position | 2,038 | 2,421
Net position | (100) | 0
Amount offset in the balance sheet2 £m | Financial liabilities at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | (21,594) | (14,997)
Amount offset in the balance sheet2 £m | Financial liabilities at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | (12,775) | (10,806)
Amount offset in the balance sheet2 £m | Financial assets at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | (21,494) | (14,997)
Amount offset in the balance sheet2 £m | Financial assets at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | (12,876) | (10,806)
Net position | (101) | 0
Net amount recognised in the balance sheet |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Derivative assets | (19,727) | (24,065)
Derivative liabilities | (16,132) | (21,676)
Net position | 3,595 | 2,389
Net position | (729) | (98)
Net amount recognised in the balance sheet | Financial liabilities at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | (21,710) | (20,564)
Net amount recognised in the balance sheet | Financial liabilities at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | (38,570) | (37,760)
Net amount recognised in the balance sheet | Financial assets at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | (20,981) | (20,466)
Net amount recognised in the balance sheet | Financial assets at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | (50,986) | (49,476)
Net position | (12,416) | (11,716)
Cash collateral (received)/ pledged £m |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Derivative assets | (2,815) | (4,071)
Derivative liabilities | 3,006 | 3,853
Net position | 191 | (218)
Net position | (46) | 393
Cash collateral (received)/ pledged £m | Financial liabilities at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | (14) | 31
Cash collateral (received)/ pledged £m | Financial liabilities at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | 2 | 8
Cash collateral (received)/ pledged £m | Financial assets at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | (32) | 362
Cash collateral (received)/ pledged £m | Financial assets at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | (75) | (257)
Net position | (77) | (265)
Non-cash collateral (received)/ pledged £m |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Derivative assets | (2,962) | (4,139)
Derivative liabilities | 882 | 1,514
Net position | (2,080) | (2,625)
Net position | (789) | 398
Non-cash collateral (received)/ pledged £m | Financial liabilities at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | (21,621) | (19,991)
Non-cash collateral (received)/ pledged £m | Financial liabilities at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | (38,424) | (37,427)
Non-cash collateral (received)/ pledged £m | Financial assets at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | (20,832) | (20,389)
Non-cash collateral (received)/ pledged £m | Financial assets at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | (50,843) | (49,341)
Net position | (12,419) | (11,914)
Master netting and similar agreements £m |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Derivative assets | (8,339) | (10,522)
Derivative liabilities | 8,339 | 10,522
Net position | 0 | 0
Net position | 0 | 0
Master netting and similar agreements £m | Financial liabilities at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | 0 | 0
Master netting and similar agreements £m | Financial liabilities at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | 0 | 0
Master netting and similar agreements £m | Financial assets at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | 0 | 0
Master netting and similar agreements £m | Financial assets at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | 0 | 0
Net position | 0 | 0
Potential net amounts if offset of related amounts permitted £m |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Derivative assets | (5,611) | (5,333)
Derivative liabilities | (3,905) | (5,787)
Net position | 1,706 | (454)
Net position | 14 | (103)
Potential net amounts if offset of related amounts permitted £m | Financial liabilities at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | (103) | (542)
Potential net amounts if offset of related amounts permitted £m | Financial liabilities at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Repurchase agreements held at fair value | (144) | (325)
Potential net amounts if offset of related amounts permitted £m | Financial assets at fair value through profit or loss |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | (117) | (439)
Potential net amounts if offset of related amounts permitted £m | Financial assets at amortised cost |  |
OFFSETTING OF FINANCIAL ASSETS AND LIABILITIES (Details) - Schedule of Offsetting of Financial Assets and Liabilities [Line Items] |  |
Reverse repurchase agreements held at fair value | (218) | (392)
Net position | £ (74) | £ (67)

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- Definition The amount of financial assets at amortised cost. The amortised cost is the amount at which financial assets are measured at initial recognition minus principal repayments, plus or minus the cumulative amortisation using the effective interest method of any difference between that initial amount and the maturity amount, and adjusted for any impairment. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 44 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_44_c&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2025-01-01 -Paragraph 8 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_8_f&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 44 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_44_c&doctype=Standard -URIDate 2025-03-27 + Details
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