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Earnings per share ("EPS") (Tables)
 12 Months Ended
Dec. 31, 2024
Earnings per share [abstract]  
Summary of Calculation of Basic and Diluted EPS
Basic EPS 
The calculation of basic EPS is as follows: 

2024
2023
2022
Profit for the year attributable to equity holders of the parent (£ million)
542 110 683 
Weighted average number of shares used in basic EPS calculation (million)
1,077 1,072 1,098 
Basic EPS50.3p10.3p62.2p
Diluted EPS 
The calculation of diluted EPS is as follows: 

2024
2023
2022
Profit for the year attributable to equity holders of the parent (£ million)
542 110 683 
Weighted average number of shares used in diluted EPS calculation (million)
1,097 1,094 1,116 
Diluted EPS
49.4p10.1p61.2p
Summary of Reconciliation Between Shares Used in Calculating Basic and Diluted EPS
A reconciliation between the shares used in calculating basic and diluted EPS is as follows: 
202420232022
mmm
Weighted average number of shares used in basic EPS calculation
1,077 1,072 1,098 
Dilutive share options outstanding— 1 1 
Other potentially issuable shares20 21 17 
Weighted average number of shares used in diluted EPS calculation
1,097 1,094 1,116