An update, no I'm not on the road with the Range Rover. The car was eventually taken to a dealer at Waimes who had a slot they could fit it into. But, the recovery truck didn't manage to get it there in time, so it's still sitting there with no idea when they can do it. I did manage to get a hire car last Friday so at least I'm mobile again.
I've found a local garage who are willing to look at it this week and have a bit of spare time, a typical village garage, but well kitted out and they have the diagnostics to do it. The next problem is the breakdown insurance company are wittering about the maximum I can claim. I'm trying to keep costs down, so far it's been about £1200 for 2 tow trucks and a hire car for 2 weeks. the more expensive option is to get myself home and leave the car here for them to repatriate. That sounds like a lot of faffing around. there's no public transport here, a bit like the Lake District but with trees, the nearest bus route is a good 7km away. Or drive hire car to Calais and go on the ferry as foot passenger. But repatriation will take up to 25 days.
So the plan this morning is phone dealer, get idea of time, if it's not within the next week, get car to local garage. I've got plenty to do here, I've got a 45 year old chalet style static caravan that needs a bit more TLC and restoration. At least now I'm mobile again I can get out to the local "bricolage" DIY store to get things.. Thanks to all for your help.