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Inventories | 12 Months Ended
--- | ---
Dec. 31, 2017
Classes of current inventories [abstract] |
Inventories | Inventories
|  | December 31, 2017 |  | December 31, 2016 |
|  | $M |  | $M |
| Raw materials and consumables | 31.0 |  |  | 28.3 |  |
| Work in progress | 28.1 |  |  | 30.5 |  |
| Finished goods and goods for resale | 23.1 |  |  | 23.7 |  |
|  | 82.2 |  |  | 82.5 |  |
Inventories above are disclosed net of any provisions for obsolete and excess inventories. The provision against obsolete and excess inventories at December 31, 2017 was $8.4 million (2016: $6.5 million). The cost of inventories recognized as an expense during the year was $282.9 million (2016: $287.3 million). The cost of inventories written-off during 2017 was $1.6 million (2016: $0.1 million).

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- Definition The entire disclosure for inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2017-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=2&date=2017-03-01&anchor=sect_Disclosure&doctype=Standard -URIDate 2017-03-09 + Details
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