You could try Yorkshire, home of the oldest [weekly English-style continuously-operating* pub-based] folk club in the world, The Topic in Bradford. I do the website, and there's a short history (going back to its founding in 1956) and a list of gigs from 1970 to last week on the site.

Not huge distance away are The Grove in Leeds, The Black Swan in York, Otley FC, Skipton Folk Unplugged, Ryburn FC, and BACCApipes in Keighley, all with websites.

Also have a look at the Folk Map http://www.folkmap.co.uk/ for a sense of geodistribution.

*We reckon it has only been closed on about 33 club nights in 52 years, and this year's Xmas Day will be the first dark club night since 2003.