A little update...
The Sierra had been bought in 1985, when it it was 7 month old.
The owner then got a Jag in 1998, he put the Sierra in his wife's name and she bimbled about in it until her death in 2002, which was when it was last used.
It went back into the second owners name, then mine, so that makes me the 5th owner.
When I got it home I gave it a clean up
had a little look under the bonnet, got a spanner on the crank and I'm pleased to say the engine was free, put a battery on that I had to see if the starter motor was willing to play, I gave it a few turns and all was good, so I chucked five litres of fresh fuel in and eventually it started