GroupCompany
2018
£m
2017
£m
2018
£m
2017
£m
Profit before tax432.1442.4241.7235.4
Adjustment for investment income (see note 4) and finance expense
(see note 5)206.6189.025.427.7
Adjustment for profit on disposal of business(22.1)
Adjustment for share of profits of joint ventures (see note 11)(2.3)(3.8)
Operating profit636.4605.5267.1263.1
Adjustments for:
Depreciation of property, plant and equipment (see note 9)348.4336.2
Amortisation of intangible assets (see note 10)28.428.7
Impairment of property, plant and equipment (see note 9)0.2
Loss on disposal of property, plant and equipment (see note 3)6.83.3
Loss on disposal of intangible assets0.5
Amortisation of deferred grants and contributions (see note 20)(6.4)(6.7)
Equity-settled share-based payments charge (see note 2)3.23.4
Other non-cash movements(3.3)(3.0)
Changes in working capital:
Decrease in inventories (see note 13)5.66.9
Decrease in trade and other receivables27.571.13.52.3
(Decrease)/increase in trade and other payables(13.0)(0.6)0.6
(Decrease)/increase in provisions (see note 19)(4.4)11.4
Pension contributions paid less pension expense charged to operating profit(39.4)(38.8)
Cash generated from operations989.81,018.1271.2265.4

The group has received property, plant and equipment of £34.2 million (2017: £33.5 million) in exchange for the provision of future goods and services (see notes 20 and A7).