2015	2014
Revenue	£567.2m	£609.1m
Headline operating profit1	£102.1m	£111.1m
Return on sales2	18.0%	18.2%
Operating profit	£77.9m	£107.0m
Headline profit before taxation1	£99.2m	£107.8m
Profit before taxation	£75.0m	£103.7m
Headline operating cash flow3	£81.6m	£100.0m
Operating cash flow4	£73.2m	£96.8m
Net cash	£12.3m	£35.7m
Basic headline earnings per share5	39.5p	43.8p
Basic earnings per share	29.6p	41.7p
Ordinary dividend per share6	15.1p	14.4p
Special dividend per share6	10.0p	20.0p
Return on capital employed7	19.0%	20.7%

1. Headline operating profit and headline profit before taxation exclude amortisation of acquired intangibles of £4.2m (2014: £3.9m), reorganisation costs of £20.0m (2014: £nil) and acquisition costs of £nil (2014: £0.2m).
2. Return on sales is defined as headline operating profit as a percentage of revenue.
3. Headline operating cash flow is defined as operating cash flow stated before cash flow relating to restructuring of £8.4m (2014: £3.0m) and acquisition costs of £nil (2014: £0.2m).
4. Operating cash flow is defined as cash generated by operations of £134.5m (2014: £150.6m) less net capital expenditure of £61.3m (2014: £53.8m).
5. A detailed reconciliation is provided in note 10.
6. See note 9.
7. Return on capital employed is defined as headline operating profit of £102.1m (2014: £111.1m) divided by the average of opening and closing capital employed of £538.4m (2014: £538.0m) as adjusted for certain items of goodwill written off. Capital employed is defined as net assets adjusted for net cash / (debt).