Software £m	Non-compete agreements £m	Customer relationships £m	Total £m
Cost
At 1 January 2016	28.8	2.9	35.0	66.7
Exchange differences	1.4	–	6.8	8.2
Additions	6.0	–	–	6.0
Acquired on acquisition of businesses	–	0.2	7.3	7.5
Disposals	(1.1)	–	–	(1.1)
At 1 January 2017	35.1	3.1	49.1	87.3
Exchange differences	(0.1)	–	(3.4)	(3.5)
Additions	5.2	–	–	5.2
Disposals	(0.3)	–	–	(0.3)
At 31 December 2017	39.9	3.1	45.7	88.7
Amortisation
At 1 January 2016	13.3	2.3	15.9	31.5
Exchange differences	1.2	–	3.5	4.7
Charge for the year	1.1	0.7	3.8	5.6
Impairment loss	0.1	–	–	0.1
Disposals	(0.4)	–	–	(0.4)
At 1 January 2017	15.3	3.0	23.2	41.5
Exchange differences	(0.1)	–	(2.0)	(2.1)
Charge for the year	1.7	0.1	4.4	6.2
Disposals	(0.3)	–	–	(0.3)
At 31 December 2017	16.6	3.1	25.6	45.3
Carrying amount
At 31 December 2017	23.3	–	20.1	43.4
At 31 December 2016	19.8	0.1	25.9	45.8