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.

	2016 Pence	2015 Pence
Basic earnings per share
— Underlying*	42.95	40.17
— Basic	14.00	22.14
Diluted earnings per share
— Underlying*	42.65	39.90
— Diluted	13.90	21.99

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

	2016 £000	2015 £000
Earnings for underlying basic and underlying diluted earnings per share	38,390	35,307
Earnings for basic and diluted earnings per share	12,512	19,459

	Number	Number
Weighted average number of ordinary shares for basic earnings per share	89,380,414	87,890,277
Impact of share options	628,307	604,887
Weighted average number of ordinary shares for diluted earnings per share	90,008,721	88,495,164

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

At 30 June 2016, there are 309,407 options that are excluded from the EPS calculations as they are not dilutive for the period presented but may become dilutive in the future.