My situation seems slightly different than possibly others, inasmuch as I have an MG4 Trophy. I have had it six months and this is the fourth time my car has stopped dead with no power, complete system shut down. On the last occasion there was a car behind me but managed to stop. There was no warning or slowing down, just stopped.
I had to get out of the car, go through the simulation of locking the car, then get back in and the car started up again. I have been fortunate in as much as if I had been on a motorway it could have caused a multiple pile up (plus myself dead}. Do you feel that I would be safe in this car?