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Operating profit | 12 Months Ended
--- | ---
Dec. 31, 2017
Analysis of income and expense [abstract] |
Operating profit | Operating profit Operating profit for continuing activities is stated after charging/ (crediting):
|  | 2017 |  | 2016 |  | 2015 |
|  | $M |  | $M |  | $M |
| Research and development expenditure charged to the consolidated income statement | 6.9 |  |  | 5.5 |  |  | 5.8 |  |
| Development capital expenditure included within non-current assets (Note 12) | 0.9 |  |  | 2.1 |  |  | 2.5 |  |
| Total research and development expenditure | 7.8 |  |  | 7.6 |  |  | 8.3 |  |
| Less development expenditure capitalized within non-current assets | (0.9 | ) |  | (2.1 | ) |  | (2.5 | ) |
| Net research and development | 6.9 |  |  | 5.5 |  |  | 5.8 |  |
| Depreciation of property, plant and equipment (Note 11) | 16.7 |  |  | 16.7 |  |  | 16.6 |  |
| Amortization of intangible assets (Note 12) | 2.3 |  |  | 1.7 |  |  | 2.2 |  |
| Loss on disposal of property, plant and equipment | 0.1 |  |  | 0.2 |  |  | — |  |
| Operating lease expense (Note 26) | 5.1 |  |  | 4.8 |  |  | 5.6 |  |
| Restructuring and other expense (Note 5) | 21.6 |  | — |  | 2.2 |  | — |  | 22.4 |  |
| Net foreign exchange gains | — |  | — |  | (0.7 | ) |  | (0.6 | ) |
| Staff costs (Note 6) | 121.3 |  |  | 111.7 |  |  | 119.3 |  |
| Cost of inventories recognized as expense | 282.9 |  |  | 287.3 |  |  | 316.2 |  |

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- Definition The disclosure of profit (loss) from operating activities. [Refer: Profit (loss) from operating activities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_10_e&doctype=Standard -URIDate 2017-03-09 + Details
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