Chris Trott is your man Shearling - he has been doing ours for years and he is great. He will hang it and butcher it for you and bag it and if you are unsure of what you want he can advise.
We used snells once and didn't get our meat back, plus it smells of death. Same thing with Stillmans when they "lost" our red ruby devon bullock! Hopkins are fine and they didn't s**t it was just someone stirring things although I think perhaps they had got a little lax over some things. The scandal was when the slaughter suck lambs for some muslim or hindu festival and local press got upset, but I've never had a problem there.