Internally generated assets
£m
Other intangible assets
£m
Total intangible assets
£m
Cost
At 30 November 201465.613.278.8
Additions4.44.4
Internal development costs capitalised24.124.1
Disposals(6.7)(6.7)
At 29 November 201583.017.6100.6
Additions4.94.9
Internal development costs capitalised34.934.9
Disposals(0.3)(0.2)(0.5)
At 27 November 2016117.622.3139.9
Accumulated amortisation
At 30 November 2014(36.6)(3.8)(40.4)
Charge for the period(12.4)(0.8)(13.2)
Impairment(0.8)(0.8)
Disposals6.76.7
At 29 November 2015(43.1)(4.6)(47.7)
Charge for the period(11.8)(0.8)(12.6)
Impairment(0.4)(0.4)
Disposals0.30.20.5
At 27 November 2016(55.0)(5.2)(60.2)
Net book value
At 29 November 201539.913.052.9
At 27 November 201662.617.179.7

The net book value of computer software held under finance leases is analysed below:

52 weeks ended
27 November
2016
£m
52 weeks ended
29 November
2015
£m
Cost14.313.8
Accumulated amortisation(11.2)(9.3)
Net book value3.14.5

For the 52 weeks ended 27 November 2016, internal development costs capitalised represented approximately 88% (2015: 85%) of expenditure on intangible assets and 22% (2015: 19%) of total capital spend including property, plant and equipment.