Bugger
Thanks for the input guys, looks like I'll have to wait for it to all get sorted then before I go pick it up (deposit is paid).
Seller is happy for me to take the car, but I can't really as I'll have to insure it on old plate no, and will have no v5 (inc new keepers slip), or tax disk/mot.

Sounds like it might be a long wait too
Why do people sell cars saying plate it not going with the car, but not remove the plate beforehand? Rather than keeping a buyer with a hole in his pocket waiting for weeks!