Driving mad, Whaddon is a pay and play site just west of Milton Keynes, it's a farm with lots of mud, but normal stuff not like the concrete at the Pit. Pretty much non damaging too. I can't do the 28th as I'm working on Comic Relief in Leicester Square that day. I have OS maps of most of Herts & Beds, but not the Watford ones. I will get the maps out and organise something, a lot of the good ones will reopen in April after the winter closures. I know there are some good ones around Santa Pod, would be a good day out.