If you really believe that you may want to check the following for starters:

http://www.direct.gov.uk/en/YoungPeople/CrimeAndJustice/TypesOfCrime/DG_10027721

That said, don't look for any such prosecution.
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Remember to immediately record your catch or you may become the catch!

It's the person who has done nothing who is sure nothing can be done. (Ewing)