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

	2020 £m	2019 £m
Cost of inventories recognised as an expense	171.1	158.8
Impairment of inventories included in above figure	1.4	2.1
Depreciation of property, plant and equipment
– owned assets	6.6	5.7
– right of use assets	3.3	–
Amortisation of intangible assets	73.9	80.9
Profit on disposal of property, plant and equipment	–	(0.3)
(Release)/recognition of impairment of receivables	(0.4)	0.6
Operating lease rentals payable	–	3.3
Research and development expenditure as incurred	28.4	25.1
Net pension credit in relation to defined benefit pension scheme (see note 23)	–	(2.8)
Auditors' remuneration	1.2	1.0
Analysis of total fees paid to the Auditors:
Audit of these financial statements	0.6	0.4
Audit of financial statements of subsidiaries pursuant to legislation	0.5	0.5
Other assurance services – audit related assurance services*	0.1	0.1
Total fees paid to Auditors	1.2	1.0

* This includes £0.06 million (2019: £0.04 million) in relation to the review of the Half-Yearly Report.

During the year a fire occurred at one of the Group's third party logistics provider locations in the Netherlands that resulted in inventory to the value of £6.4 million being destroyed and written off. The inventory write off has been included in the impairment of inventories value above and is offset by amounts recovered through insurance proceeds of £5.3 million and a receivable from the insurers of £1.1 million with no impact on the Income Statement.