2016	2015
Revenue	£600.6m	£567.2m
Headline operating profit1	£99.6m	£102.1m
Return on sales2	16.6%	18.0%
Operating profit	£94.5m	£77.9m
Headline profit before taxation1	£97.0m	£99.2m
Profit before taxation	£91.9m	£75.0m
Headline operating cash flow3	£91.4m	£81.6m
Operating cash flow4	£83.2m	£73.2m
Net cash	£1.1m	£12.3m
Basic headline earnings per share5	37.0p	39.5p
Basic earnings per share	35.2p	29.6p
Ordinary dividend per share6	15.8p	15.1p
Return on capital employed7	17.1%	19.0%

1. Headline operating profit and headline profit before taxation exclude amortisation of acquired intangibles of £4.5m (2015: £4.2m), reorganisation costs of £nil (2015: £20.0m) and acquisition costs of £0.6m (2015: £nil).
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 £7.6m (2015: £8.4m) and acquisition costs of £0.6m (2015: £nil).
4. Operating cash flow is defined as cash generated by operations of £146.3m (2015: £134.5m) less net capital expenditure of £63.1m (2015: £61.3m).
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 £99.6m (2015: £102.1m) divided by the average of opening and closing capital employed of £582.3m (2015: £538.4m) as adjusted for certain items of goodwill written off. Capital employed is defined as net assets adjusted for net cash/(debt).