Thanks all for your comments.
Luddite, there is no play, the steering reacts to the smallest turn even when driving straight ahead. It is under control but we have adjust the rack a little bit on the light side the way Dave W has described the steering of his Roadster before he screwed the pinion a tad more in. We will do the same. This time we will turn the steering wheel to get a proper feel for the right amount of resistance when altering the pressure of the pinion. As I mentioned the rack was too heavy resistant and now it is just a bit to loose and gives a weird feel during the straight ahead part of steering. Play should not occure regarding this system at all and I do not feel play. See Lorne Goldman Watchpoint IV. http://www.gomog.com/allmorgan/steeringr&p.html
And as you can see in the photos above, the condition of rack and pinion still looks pretty good.

Regarding the U joints, without U joint shafts connected my steering turns smoothly and even when moved at the wheels.
Jon, the first part of the steering shafts which starts directly from the steering wheel looks very good in our case. It is the following part that is not „round“. We will have another close look at it.

IcePack, the steering was adjusted to 1mm toe in with the change to new tyres in spring. I know what you mean. A little bit of toe out gives a strange feeling and disturbs the straight ahead driving quite sensitively.

'14 4/4 graphite grey