Off the Tracks has a festival in the spring, and one in the summer. Its logo is "Most of us will never do great things, but we can all do small things in a great way". This seems to suit it. It is a small festival (although the summer one is a bit bigger!) with a reputation for being well run. The music is a mixture of world, roots and fusion, and there is a wide selection of real ales to sample while you are enjoying it!
Website: Off the Tracks Festivals