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Earnings per share
12 Months Ended
Dec. 31, 2023
Earnings per share [abstract]  
Earnings per share
9. Earnings per share
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.
Diluted EPS has been calculated based on the earnings amounts above. At 31 December 2023, options to purchase 25.2 million ordinary shares (2022: 19.7 million, 2021: 7.2 million) were outstanding, but were excluded from the computation of diluted earnings per share because the exercise prices of these options were greater than the average market price of the Group’s shares and, therefore, their inclusion would have been accretive. 
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 
 
At 31 December 2023 there were 1,141,513,196 (2022: 1,141,427,296, 2021: 1,224,459,550) ordinary shares in issue, including 66,675,497 treasury shares (2022: 70,489,953, 2021: 70,489,953).