Hey up Richard,
My boss is going to the gig at Pock and is taking his 12 year old lad who has just started learning the guitar and is a fan of yours!
He knows I post on here and has asked me to ask if there is any way of getting his son's guitar signed on the night? I wasn't sure if this would be possible or not but said I would ask for him.
Hopefully you will be able to do it so I don't end up on the dole....
(only kidding, he's a nice guy really!) 
Best,
Bobby