Earnings per ordinary share has been calculated by dividing the profit attributable to equity holders of the parent after taxation for each financial period by the weighted average number of ordinary shares in issue during the period.

2015
Pence
2014
Pence
Basic earnings per share
— Underlying*40.1737.61
— continuing operations40.1736.45
— discontinued operations1.16
— Basic22.1467.57
— continuing operations22.1422.22
— discontinued operations45.35
Diluted earnings per share
— Underlying*39.9037.48
     — continuing operations39.9036.32
     — discontinued operations1.16
 — Diluted21.9967.33
     — continuing operations21.9922.14
     — discontinued operations45.19

The calculations of basic and diluted earnings per share are based upon:

2015
£000
2014
£000
Earnings for underlying basic and underlying diluted earnings per share35,30732,869
— continuing operations35,30731,849
— discontinued operations1,020
Earnings for basic and diluted earnings per share19,45959,047
— continuing operations19,45919,416
— discontinued operations39,631
NumberNumber
Weighted average number of ordinary shares for basic earnings per share87,890,27787,385,689
Impact of share options604,887312,771
Weighted average number of ordinary shares for diluted earnings per share88,495,16487,698,460

* Underlying measures exclude non-underlying items as defined within the Consolidated Income Statement.

At 30 June 2015, there are 351,332 options that are excluded from the EPS calculations as they are not dilutive for the period presented but may become dilutive in the future.