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Earnings per share (Tables)
 12 Months Ended
Dec. 31, 2023
Earnings per share [abstract]  
Calculation of Basic and Diluted EPS
Basic EPS 
The calculation of basic EPS is as follows: 

2023
2022
2021
Earnings1 (£m)
110.4 682.7 637.7 
Weighted average shares used in basic EPS calculation (m)1,072.1 1,097.9 1,194.1 
EPS10.3p62.2p53.4p
Note
1Earnings is equivalent to profit for the year attributable to equity holders of the parent. 
Diluted EPS 
The calculation of diluted EPS is as follows: 

2023
2022
2021
Earnings1 (£m)
110.4 682.7 637.7 
Weighted average shares used in diluted EPS calculation (m)
1,094.0 1,116.4 1,215.3 
Diluted EPS
10.1 p61.2 p52.5 p
1Earnings is equivalent to profit for the year attributable to equity holders of the parent.
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: 
202320222021
mmm
Weighted average shares used in basic EPS calculation1,072.1 1,097.9 1,194.1 
Dilutive share options outstanding0.6 0.7 1.3 
Other potentially issuable shares21.3 17.8 19.9 
Weighted average shares used in diluted EPS calculation1,094.0 1,116.4 1,215.3