TAXATION - Schedule of Tax on Profit Before Tax Differs from Theoretical Amount that Arise Using Basic Corporation Tax Rate (Details) - GBP (£) £ in Millions |
6 Months Ended | |
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Jun. 30, 2026 |
Jun. 30, 2025 |
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| Major components of tax expense (income) [abstract] | ||
| Applicable tax rate (percentage) | 25.00% | 25.00% |
| Profit before tax | £ 517 | £ 746 |
| Tax calculated at the statutory rate of 25% (H1-25: 25%) | 129 | 187 |
| Bank surcharge on profits | 17 | 23 |
| Non-deductible preference dividends paid | 3 | 4 |
| Non-deductible UK Bank Levy | 5 | 6 |
| Other non-deductible costs and non-taxable income | 2 | 5 |
| Tax relief on dividends in respect of other equity instruments | (13) | (20) |
| Adjustment to prior year provisions | 0 | (10) |
| Tax on profit | £ 143 | £ 195 |
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- Definition The applicable income tax rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that the entity does not separately disclose in the same statement or note. [Refer: Accounting profit; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The product of the accounting profit multiplied by the applicable tax rate(s). [Refer: Accounting profit; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Tax effect of bank corporation tax surcharge on profits. No definition available.
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- Definition Tax effect of non-deductible preference dividends paid. No definition available.
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- Definition Tax effect of non-deductible bank levy. No definition available.
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- Definition Tax effect of prior year adjustments. No definition available.
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- Definition Tax relief on dividends in respect of other equity instruments. No definition available.
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