Many many thanks for all your comments and effort. I am now wondering just how good the guy was who aligned the car. It was done at a performance shop that does a lot of work for several car builders in the area. I had to tell him to make adjustments to the 4 bar to get the rear right with the front. At the time I thought it was because more time (money) was involved. I will take some photos tomorrow of the top of the A Arms and the strut bar bracket that is welded to the frame. I think from memory that the bar has room for adjustment with threads still showing on the back of the rod. I will take a good look tomorrow.
I looked and there are several people offering adjustable A Arms both upper and lower. My first thought was to identify the problem and then modify if required.
Again, many thanks!