What is the going UK rate for audio transcription and translation for French into English?

I've been asked to do some translation of cartoons in English from French - what is the going rate per hour?What is the going UK rate for audio transcription and translation for French into English?
If you will be self employed you can make your own rate. Try not to price yourself out of the market or under price as people would think you are no good...weird i know. As its a very skilled profession you could as a good rate but one that pulls people in. Prehaps 拢20 an hour or do it by the word. This can be better as people will have a definative price, the other way is a bit hit and miss for pricing.What is the going UK rate for audio transcription and translation for French into English?
There is a specialized forum over there:

http://www.proz.com/What is the going UK rate for audio transcription and translation for French into English?
I don't know about cartoons; but Eng-Fr or Fr-Eng written work is around 拢6 per 100 words.