Nowhere I've found yet. I take mine to Atkin Motors in Malton, which is a trek, but they do an excellent job, know 350's and the owner's son is/was a member on here. They are also a Nissan garage which means you get the Nissan stamp in your book... if you like that kind of thing. I used to take mine to Simon Green in Horsforth, but after a couple of bad experiences (Not putting the gearbox oil plug back in and a terrible attempt at paintwork - with some shitty customer service thrown in... to name a few experiences, I avoid like the plague).
I've not heard anywhere else recommended in Bradford/Leeds, but that doesn't mean a good place doesn't exist...