The following items have been included in arriving at profit before taxation of continuing operations:

	2019 £m	2018 £m
Cost of inventories recognised as an expense	158.8	140.4
Impairment of inventories included in above figure	2.1	2.0
Depreciation of property, plant and equipment
– owned assets	5.7	4.8
Amortisation of intangible assets	80.9	56.6
Profit on disposal of property, plant and equipment	(0.3)	–
Impairment of intangible assets – underlying	–	0.1
Recognition/(release) of impairment of receivables	0.6	(0.1)
Operating lease rentals payable	3.3	2.8
Research and development expenditure as incurred	25.1	18.3
Net pension (credit)/expense in relation to defined benefit pension scheme (see note 23)	(2.8)	0.8
Auditors' remuneration	1.0	1.4
Analysis of total fees paid to the Auditors:
Audit of these financial statements	0.4	0.4
Audit of financial statements of subsidiaries pursuant to legislation	0.5	0.5
Other assurance services – audit related assurance services*	0.1	–
Other assurance services – transaction services	–	0.5
Total fees paid to Auditors	1.0	1.4

* This includes £0.04 million (2018: £0.04 million) in relation to the review of the Half-Yearly Report.