Just a follow up on this post fellow Oofs!
I have collected the car yesterday having had a lot of work done. Basically I said to my garage to keep me informed of what they found and I would yay or nay as we went along. Many yays and £££'s later I have had the following replaced:
Tie rod ends x2, link arms x2, both shocks and top mounts, both suspension arms and ARB bushes.
Parts used were Lemforder and another name which I can't remember but was also on some of the GM original parts replaced.
I was shown the replaced parts and there were a lot of splits and tears in the bushes pretty well everywhere. The shocks were weak - very easily compressed by hand - and the top mounts were compacted by over 10mm compared to the new ones.
The overall result is that the car is now totally driveable! :-) On a quiet straight road I gradually increased speed and braking and there is minimal pulling either with hands off the wheel or braking hard.
I have no idea what the geometry is now but feel the car is in a fit state to take to Wheels in Motion, hopefully next week.
Will be calling them on Monday morning - unless they are there today.
Many thanks to all for your guidance and suggestions following my post

Dave.