Smoke Kings is near Leeds and the Black Swan baccie shop is in Scarborough. Both do various black cherries. Personally, the best I've tried is the GH Exclusiv BC. Some of the others can taste artificial and a bit soapy. The Exclusiv is spot-on.
If you ever can't get hold of any, Aireys in Kendal can get any Gawiths tobacco at the drop of a hat as the factory is in the town. Funny little old fashioned shop. Chap who owns it doesn't do computers. He has all his mail-order customer details on paper files and has been supplying some of them for over 30 years. My kind of shop.