$ million	2021	2020	Change	Constant currency change
Revenue	2,553	2,341	9%	7%
Core revenue	2,553	2,341	9%	7%
Gross profit	1,301	1,201	8%	6%
Core gross profit	1,301	1,213	7%	5%
Operating profit	582	579	1%	3%
Core operating profit	632	566	12%	15%
EBITDA	727	670	9%	10%
Core EBITDA	727	674	8%	10%
Profit attributable to shareholders	421	431	(2)%	2%
Core profit attributable to shareholders	450	408	10%	15%
Basic earnings per share (cents)	182.3	182.6	0%	4%
Core basic earnings per share (cents)	194.8	172.9	13%	17%
Total dividend per share (cents)	54.0	50.0	8%	-
Cash flow from operating activities	638	464	38%	-