Check out Bedale Acoustic Music festival. There is a mixture of 'acoustic music' genres being performed but lots and lots of folk (Bob Fox, Young'uns, Blackbeards TP, Tom & Barbara Brown etc, etc).

3 singaround/ session venues over the weekend and plenty of space around The Big Sheep Little Little Cow Farm where the campsite and some other events are located for impromptu singing and playing.

This is a brand new festival in North Yorkshire just a mile or so off the A1.

BAMfest Website