$ million	2019	2018	Change	Constant currency change
Revenue	2,207	2,070	7%	6%
Core revenue	2,203	2,076	6%	6%
Gross profit	1,148	1,050	9%	8%
Core gross profit	1,144	1,072	7%	6%
Operating profit	493	371	33%	31%
Core operating profit	508	460	10%	9%
EBITDA	592	492	20%	19%
Core EBITDA	593	549	8%	6%
Profit attributable to shareholders	486	282	72%	70%
Core profit attributable to shareholders	364	332	10%	7%
Basic earnings per share (cents)	200.8	117.0	72%	69%
Core basic earnings per share (cents)	150.4	137.8	9%	7%
Dividend per share (cents)	44	38	16%	-
Net cash flow from operating activities	472	430	10%	-