Here are some of the Festivals that I know about in the North West of England during 2013 ( they all have websites)

The Shanty Festival Ellesmere port 29th- 31st March
Edale Folk Festival Edale Derbyshire 10th - 12th May
Chester Folk Festival Kelsall village Cheshire 24th - 27th May
Middlewich Folk and roots Festival Middlewich Cheshire 14 - 16 June
Fylde Folk Festival Fleetwood 30th August - 1 Sept.

These are all suitable for listeners like me.
The line ups at both Chester and Fylde are the tops.
But there are good artists at the others as well.

If you know of any more within easy reach of the North West then please post.