To update this thread collected the car today brought it home.
Goo news is its solid (In the UK mx5s can suffer badly from rust), mechanically its fine and all the RS Limited parts and there with the limited edition sticker confirming its originality. Probably needs more TLC then the photos have way to but for the money it's a good buy. I have to decide whether it will be a catalyst for my other cars or another one to collection. Seeing as it's a RS a Limited which is all complete I'm tempted to lock away as probably a good longer term investment if and when MK1s starting increasing in value here in the UK.