There is a lot of different K in Leeds mate, both my flatmates are big into it every night. They have occasionally gotten shit but it mostly seems to be good enough to wonk em out or actual stuff that gets people fucked having those crazy little K moments. It could be that they are buying off students who might be getting there stuff from outside of town not sure. Certainly ain't the days when everyone and their dog was selling it around the student parts and it was always good, but seems to be better than it was a year ago?
Don't take the stuff anymore but can say from the last few months of being back that there is proper about in west Yorks, just less people with it, higher prices and the occasional batch of crap. Pretty much the same in Manc from what I hear, big drought is over and it ain't back like it was but easy to find and of course demand is still high