Found the Jeepster in Buttertubs, he couldn't quite cope with the terrain round here so I found him a nice quiet byway running from N54°18.049' W2°07.005' to N54°15.814' W2°12.728' and gave him a ride in my Landcruiser which is no Chelsea tractor (you only have to look at the bent sidesteps to realise that).
He's now back down south with me to try some of our less arduous green lanes in Surrey and Hampshire. Maybe I'll take him to a ford!