In the past 2 months I have spent almost £3000 on my car, new clutch and dual mass flywheel, timing chain, rear dampers, rear trailing arms and new rear drop links. And now it’s thrown more faults in my face, the steering angle sensor has thrown its dummy out the car and decided it doesn’t want to play any more and it also want to corner like is got 4 wheel steering

I see what you mean, but the clutch assembly, timing chain and rear dampers should all be good for years to come (depending on your driving style).

 

The SAS I can't help with, but the trail arms and droplinks should be good or warranty/sale of goods act replacements.

is everyrhing tightened up priperly at the back end after the work being done and have you the tracking done after all that suspension work?