It's not so much a folk festival as a series of concerts - rock, folk, jazz, brass bands, choirs, you name it - in the various towns and villages, spread over a couple of months. It looks like Jez's gig will also feature the Bad Pennies and Benny Graham.
If I've any money left by then (work is looking decidedly dodgy AND we'll have just come back off holidays) I might see you there. If you want, sign up to Mudcat, so you can send me a private message, and I'll see if I can get you a ticket.