2018 £m	2017 £m	2016 £m	2015 £m	2014 £m
Revenue	728.6	690.2	600.6	567.2	609.1
Profit:
Headline operating profit	138.3	123.9	99.6	102.1	111.1
Amortisation of acquired intangible fixed assets	(3.7)	(4.5)	(4.5)	(4.2)	(3.9)
Acquisition costs	(0.5)	–	(0.6)	–	(0.2)
Operating profit prior to exceptional items	134.1	119.4	94.5	97.9	107.0
Reorganisation costs	–	–	–	(20.0)	–
Operating profit	134.1	119.4	94.5	77.9	107.0
Net finance costs	(1.9)	(2.4)	(2.6)	(2.9)	(3.3)
Profit before taxation	132.2	117.0	91.9	75.0	103.7
Taxation	(28.6)	(19.7)	(24.9)	(18.8)	(24.4)
Profit after taxation	103.6	97.3	67.0	56.2	79.3
Non-controlling interests	(0.4)	(0.2)	–	–	0.1
Profit attributable to the equity holders of the parent	103.2	97.1	67.0	56.2	79.4
Headline earnings per share (pence)	55.9	49.2	37.0	39.5	43.8
Dividend per share (pence)	19.0	17.4	15.8	15.1	14.4
Special dividend per share (pence)	20.0	25.0	–	10.0	20.0
Assets employed
Intangible fixed assets	206.9	201.0	206.7	175.2	172.1
Tangible fixed assets	546.6	520.5	509.0	429.6	434.6
Other assets and liabilities	(63.1)	(63.6)	(88.5)	(67.5)	(71.5)
	690.4	657.9	627.2	537.3	535.2
Financed by
Share capital	33.1	33.1	33.1	33.1	33.1
Reserves	692.8	663.9	594.8	516.1	537.3
Shareholders' funds	725.9	697.0	627.9	549.2	570.4
Non-controlling interests	0.7	0.5	0.4	0.4	0.5
Net cash	(36.2)	(39.6)	(1.1)	(12.3)	(35.7)
Capital employed	690.4	657.9	627.2	537.3	535.2
Net assets per share (pence)	379.1	364.1	328.0	286.9	297.9
Return on capital employed (%):
Headline operating profit divided by the average of opening and closing capital employed as adjusted for certain items of goodwill written off	20.5	19.3	17.1	19.0	20.7