Further to my trans failsafe program..
I took the car to the transmission specialist who rebuilt the unit.

I drove the car for about 1 1/2 miles absolutely fine. No problem whatsoever until I had stopped and turned the engine off when I dropped the daughter off.

Upon restarting it went into failsafe mode which also included failure of all the instruments on the cluster apart from the fuel gauge. The temp gauge was all the way over the hot side. No speedo and no rev counter.
I maybe mistaken (due to my heater blower fault - see other thread) but the HVAC didn’t seem to respond when I fiddled with the ‘-‘ and ‘+’ for the fan either.
Everything else seemed to be working ie lights, radio, steering and seat auto wheel adjustment (I have the comfort option).

Anyway, Ian at the garage plugged in the diagnostic machine to see what’s what and all that came up were 3 modules to read. He said that there should be lots more on the display which suggests ( to him anyway) a wiring fault or body control module fault but he did say that he is an expert on transmissions, not electronics.

Thoughts or experience anyone?