GroupTotal
£m
Cost
At 1 April 2018395.6
Additions40.9
At 31 March 2019436.5
Additions27.6
Disposals(22.7)
At 31 March 2020441.4
Accumulated amortisation
At 1 April 2018197.9
Charge for the year35.9
At 31 March 2019233.8
Charge for the year41.2
Disposals(22.6)
At 31 March 2020252.4
Net book value at 31 March 2019202.7
Net book value at 31 March 2020189.0

The group's intangible assets relate mainly to computer software.

At 31 March 2020, the group had entered into contractual commitments for the acquisition of intangible assets amounting to £2.6 million (2019: £1.5 million).

Company

The company had no intangible assets or contractual commitments for the acquisition of intangible assets at 31 March 2020 or 31 March 2019.