Earnings per share ("EPS") - Calculation of Basic and Diluted EPS (Details) - GBP (£) £ / shares in Units, £ in Millions, shares in Millions |
6 Months Ended | |
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Jun. 30, 2026 |
Jun. 30, 2025 |
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| Earnings per share [abstract] | ||
| Earnings | £ 19 | £ 44 |
| Weighted average shares used in basic EPS calculation (shares) | 1,077 | 1,077 |
| EPS (pounds per share) | £ 0.018 | £ 0.041 |
| Diluted earnings | £ 19 | £ 44 |
| Weighted average shares used in diluted EPS calculation (shares) | 1,098 | 1,093 |
| Diluted EPS (pounds per share) | £ 0.017 | £ 0.040 |
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- Definition The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition The profit (loss) attributable to ordinary equity holders of the parent entity. [Refer: Profit (loss)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The profit (loss) attributable to ordinary equity holders of the parent entity, adjusted for the effects of all dilutive potential ordinary shares. [Refer: Profit (loss)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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