I think Northumberland is a bit of a clue.
fRoots on NE England

There are things in Newcastle, especially during Uni term time, what with their Folk Music course. The Byker pubs spring to mind.

Mudcat threads -
Sessions in Newcastle u Tyne
& maybe notso appropriate
Newcastle French dance/music session 2nd Sun.(UK)

But information can go out of date overnight so ring first if ging a long way. There are people you could PM in the threads.