Aye I daresay there would be. Not sure about the legality of selling wild quarry though and id have to register and all that jazz. Plus not eating it would be hard lol
Bizarrely it is not complicated at all. If you shoot the game yourself, prepare it yourself and sell it to the consumer, you are just required to register yourself as a food business with your local authority. There are a couple of EU regulations that apply as well, but nothing to stop you turning your game into jerky and selling it.... its more about food hygiene which is relatively simple. Obviously there is a labelling issue, but again, as long as you read and understand what is required and match it, shouldn't be too complicated.
The problem will arise if you do not shoot the game yourself and you're trading in carcasses with a third party. You're then subject to the FSAOG and you're going to need a vet. Sounds weird, but just to comply with tracing where the carcass has come from. Shouldn't apply to you at all though.
I'm doing a food hygiene certificate soon, only so I can do a favour for an old friend this coming summer, but I can let you know how it goes and whats involved if you're interested.