Thanks Guys, and point well taken Billy - perhaps if the landowners see
that we aren't a load of idjits, but part of an organisation that is promoting
sensible practices we will be better off for it. I'll have a look at CRAG as well and decide which one to go for.
Happy to say that what I thought was a gearbox output drive problem (as did a few mechanics) turned out to be nearside back wheel bearing.
diagnosed and fixed by a pretty good Frontera mechanic near Southampton. If anyone needs him, let me know. (But I do know you guys are good at DIY

)