Group

Total
£m
Cost
At 1 April 2015264.5
Additions67.0
Transfer to assets classified as held for sale(20.6)
At 31 March 2016310.9
Additions54.5
Disposals(8.2)
At 31 March 2017357.2
Accumulated amortisation
At 1 April 2015119.6
Charge for the year31.2
Transfer to assets classified as held for sale(2.3)
At 31 March 2016148.5
Charge for the year28.7
Disposals(7.7)
At 31 March 2017169.5
Net book value at 31 March 2016162.4
Net book value at 31 March 2017187.7

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

At 31 March 2017, the group had entered into contractual commitments for the acquisition of intangible assets amounting to £1.7 million (2016: £8.3 million).

Company

The company had no intangible assets or contractual commitments for the acquisition of intangible assets at 31 March 2017 or 31 March 2016.