I've got the Mountain Biking UK book, and I was hoping it would have more stuff about natural (non trail centre/jump spot) trails, routes and areas. I'll see if I can find that book to flick through in a bike shop, though. Does it say much about riding outside built trail centres?
I think the riding we're looking for is a reflection of the holiday we're after: getting away from it all, exploring, covering some ground, "My god, look at that view, we haven't seen anyone for ages and can you believe this singletrack?" kind of a thing. Rather than getting sick in the bike park, which I'm not so good at and and my girlfriend even less so.