15. Other intangible assets

Internally
generated
Other
Development
costs
£000
Computer
software
£000
Patented and
unpatented
technology and
know-how
£000
Trademarks and
trade names
£000
Customer
contracts and
relationships
£000
Licences and
distribution
agreements
£000
Total
£000
Cost
At 1 May 20126861,5436,3975,03610,5864,00628,254
Effects of exchange rate changes63262240167154886
Additions965521,017
Disposals(7)(7)
Disposal of subsidiaries(1,714)(137)(4,007)(5,276)(3,376)(4,148)(18,658)
At 30 April 20131,4062,6977,3771211,492
Accumulated amortisation
At 1 May 2012531,2593,7113,1994,1593,16015,541
Effects of exchange rate changes417716116296600
Charge for the year481316404117492372,216
Disposals(3)(3)
Disposal of subsidiaries(105)(34)(2,793)(3,771)(2,500)(3,485)(12,688)
At 30 April 20131,3561,7322,57085,666
Net book amount at 30 April 2013509654,80745,826
Cost
At 1 May 20113501,5326,2554,90410,5033,67827,222
Effects of exchange rate changes101421328387454
Additions32611241578
At 30 April 20126861,5436,3975,03610,5864,00628,254
Accumulated amortisation
At 1 May 20111,0582,9942,6243,3842,70512,765
Effects of exchange rate changes66623790255
Charge for the year532016515137383652,521
At 30 April 2012531,2593,7113,1994,1593,16015,541
Net book amount at 30 April 20126332842,6861,8376,42784612,713
Net book amount at 1 May 20113504743,2612,2807,11997314,457