Earnings per share

12 Months Ended

Dec. 31, 2018

Basic earnings per share are computed by dividing net income for the period by the weighted-average number of ordinary shares outstanding, net of Treasury shares and shares held in ESOP. Diluted earnings per share are computed by dividing net income for the period by the weighted average number of ordinary shares outstanding and the dilutive ordinary shares equivalents.

Basic and diluted earnings per share were calculated as follows:



	Years ended December 31,
In millions except share and per-share data	2018		2017		2016
Basic earnings:
Net income	$	25.0	$	16.6	$	17.8
Weighted average number of £0.50 ordinary shares:
For basic earnings per share	26,708,469		26,460,947		26,443,662
Dilutive effect of potential common stock	983,793		263,034		210,976
For diluted earnings per share	27,692,262		26,723,981		26,654,638
Earnings per share using weighted average number of ordinary shares outstanding:
Basic earnings per ordinary share	$	0.94	$	0.63	$	0.67
Diluted earnings per ordinary share	$	0.90	$	0.62	$	0.67