GroupLand and buildings
£m
Infra-
structure assets
£m
Operational assets
£m
Fixtures, fittings, tools and equipment
£m
Assets in course of construction
£m
Total
£m
Cost
At 1 April 2018367.25,386.37,250.8526.61,228.414,759.3
Additions5.560.8126.311.6522.0726.2
Transfers(12.1)43.387.36.5(125.0)
Disposals(0.9)(42.3)(6.5)(49.7)
At 31 March 2019359.75,490.47,422.1538.21,625.415,435.8
Opening balance adjustment on adoption of IFRS 1648.64.41.454.4
Additions6.0140.5157.510.1445.4759.5
Transfers6.0131.1358.824.1(520.0)
Disposals(13.6)(31.5)(251.2)(13.1)(309.4)
At 31 March 2020406.75,730.57,691.6560.71,550.815,940.3
Accumulated depreciation
At 1 April 2018119.7385.43,092.3371.43,968.8
Charge for the year8.335.4279.334.3357.3
Transfers(0.5)0.5
Disposals(0.6)(37.7)(5.4)(43.7)
At 31 March 2019126.9421.33,333.9400.34,282.4
Charge for the year9.844.4353.533.9441.6
Disposals(13.5)(31.2)(237.1)(12.8)(294.6)
At 31 March 2020123.2434.53,450.3421.44,429.4
Net book value at 31 March 2019232.85,069.14,088.2137.91,625.411,153.4
Net book value at 31 March 2020283.55,296.04,241.3139.31,550.811,510.9

Included within the net book value at 31 March 2020 is £57.4 million relating to leased assets. Further details on the group's leases are disclosed in note 18.

During the year ended 31 March 2019, there was a transfer of £17.8 million cost and associated £0.5 million accumulated depreciation from land and buildings to infrastructure assets following a data cleanse exercise in respect of the fixed asset register.

At 31 March 2020, the group had entered into contractual commitments for the acquisition of property, plant and equipment amounting to £432.6 million (2019: £300.7 million). In addition to these commitments, the group has long-term expenditure plans which include investments to achieve improvements in performance required by regulators and to provide for future growth.

Company

The company had no property, plant and equipment or contractual commitments for the acquisition of property, plant and equipment at 31 March 2020 or 31 March 2019.