If you like an adventure you could drive it back but if it's been stood a long time I'd ship it back, as long as you've got all the paperwork registering in the UK with the DVLA should be simple enough, have a look at there website, registering as ag may be hit and miss are you arb or agricultural business this helps if you can prove its final use, or are you going to turn it into a camper ?
Moose