I saw a Tubby Hayes Tribute Big Band about 8 years ago and, yes, they were very good indeed. Peter King and Alan Skidmore burnt the place up!
Wigan jazz activity is hard to locate now. They don't seem to have a home anymore and tend to pop up without warning in obscure rural spots.
The two venues where I used to see Greg are no longer operating either, so if he's been here this season, I've missed him.