Schoolboy error! I only checked the front wheels before sending it off to body shop hospital to have new panels fitted. All four wheel trims showed a 5 stud fitting so assumed front and back would be the same, but it seems it has the heavy duty six stud (6 x 170) wheels on the back!
The kingpins need doing anyway so hopefully I can get some matching front hubs. Downside is that from looking at various posting on this forum I'm doomed as far as getting some decent wheels is concerned!!
So my new Vantec 2 alloys are available - stand me in £312.50 (£295 + 17.50 carriage) if anybody is interested, PM me and you can have them for that.