12. Property, Plant and Equipment

	Land and buildings £m	Fixtures, fittings and equipment £m	Payments on account and assets in course of construction £m	Total £m
Cost
At 1 April 2016	72.9	205.2	—	278.1
Additions	5.0	12.5	0.2	17.7
Disposals	(0.6)	(2.6)	—	(3.2)
At 31 March 2017	77.3	215.1	0.2	292.6
Reclassification from intangibles	—	4.4	—	4.4
Additions	3.6	13.9	1.8	19.3
Disposals	(0.8)	(4.2)	–	(5.0)
At 30 March 2018	80.1	229.2	2.0	311.3
Depreciation and impairment
At 1 April 2016	38.0	132.8	—	170.8
Depreciation and impairment for the period	4.8	16.8	—	21.6
Disposals	(0.5)	(2.1)	—	(2.6)
At 31 March 2017	42.3	147.5	—	189.8
Reclassification from intangibles	—	0.4	—	0.4
Depreciation and impairment for the period	5.7	17.9	—	23.6
Disposals	(0.7)	(3.1)	—	(3.8)
At 30 March 2018	47.3	162.7	—	210.0
Net book value at 30 March 2018	32.8	66.5	2.0	101.3
Net book value at 31 March 2017	35.0	67.6	0.2	102.8

No fixed assets are held as security for external borrowings.

Included in the above are assets held under finance leases as follows:

	Land and buildings¹ £m	Fixtures, fittings, and equipment £m	Total £m
As at 30 March 2018
Cost	12.7	3.0	15.7
Additions	—	0.6	0.6
Accumulated depreciation	(7.1)	(1.0)	(8.1)
Net book value	5.6	2.6	8.2
As at 31 March 2017
Cost	12.7	2.5	15.2
Additions	—	0.5	0.5
Accumulated depreciation	(6.6)	(1.4)	(8.0)
Net book value	6.1	1.6	7.7

Finance lease liabilities are payable as follows:

	Minimum lease payments 2018 £m	Interest 2018 £m	Principle 2018 £m	Minimum lease payments 2017 £m	Interest 2017 £m	Principle 2017 £m
Less than one year	2.0	0.7	1.3	2.2	0.8	1.4
Between one and five years	6.9	2.3	4.6	7.0	2.4	4.6
More than five years	6.8	1.1	5.7	7.4	1.4	6.0
	15.7	4.1	11.6	16.6	4.6	12.0