Joined a group of others for some trail riding in Hamsterley Forest (down by Durham) on Saturday. All on mountain bikes of some description except muggins here on the do-everything, racks front and back, semi-slick tyred utility bike. Which only had two working cogs on the rear cassette because I'd been cheap and only replaced the chain (lesson learnt...)
And it was great! I think I'd have suffered more if the mud had been worse, but it got up and down everything the bouncy-bike people did even with an off-road novice like me on top. Even got it off the ground completely a few times. Highly recommended.
Now hunting for suitable off-roady stuff nearby. I've also added a singlespeed, rigid 29er to the list of 'bikes that I'd like if I but had the space'. Surly Ogre or similar...