New EGR valve fitted as the original was faulty and remained closed, this should have fixed it according to the service guys. The ECU showed an EGR fault code which went with the new part.
It is not fixed however, there is minimal smoke from the exhaust now but it has still stalled whilst sat in D at lights or junctions when the engine is cold and below about 70c.
The dealers were excellent when I walked back in, very sorry, very surprised, came out for a test drive, watched the
problem, drove and experienced it for themselves, tested all the auto combinations with a mixture of the foot brake and handbrake, D to R etc, said this one would give him a sleepless night, he'd have the car for three days and I could have a courtesy car for the period.
Superb customer service, just hope they can fix the
problem.