NOTES TO THE FINANCIAL STATEMENTS
16. OTHER INTANGIBLE ASSETS
Customer contracts £m |
Patents £m |
Total £m |
|
Acquired intangible assets |
|||
Cost: |
|||
At 1 April 2008 |
12.5 |
0.2 |
12.7 |
At 31 March 2009 |
12.5 |
0.2 |
12.7 |
At 31 March 2010 |
12.5 |
0.2 |
12.7 |
Amortisation: |
|||
At 1 April 2008 |
6.1 |
- |
6.1 |
Charge for year |
1.2 |
- |
1.2 |
At 31 March 2009 |
7.3 |
- |
7.3 |
Charge for year |
0.3 |
- |
0.3 |
At 31 March 2010 |
7.6 |
- |
7.6 |
Carrying amount: |
|||
At 31 March 2009 |
5.2 |
0.2 |
5.4 |
At 31 March 2010 |
4.9 |
0.2 |
5.1 |
Customer contracts are amortised over the useful economic life of each contract which at acquisition ranged between two and 15 years. The average remaining life is three years.
Patents are amortised over their estimated useful economic lives which at acquisition was 13 years. The average remaining life is seven years.
The carrying values of other intangible assets are reviewed annually or when events or changes in circumstance indicate that the carrying amounts may not be fully recoverable.