Paul , looks like you made some fatal errors there .......sending important documents without taking copies
I've got Reg docs of vehicles that currently are not on the road and before SORN came in and dont have any probs ??
The removal of grandad rights was an issue due to new puter system but was only for a short while from memory.
Getting vehicles registered for road use shouldnt be a problem at all, worst case it "might" need a SVA test but I dont know the full rules for light weight trike/quads etc but if the likes of scrappy races and topgear can get those things roadworthy I cant see a City El being much of a problem
ChrisB