mr geezer

My focus tdci 1800 ran fine until recently. I was driving normally on a light throttle & the engine suddenly cut out. On cranking, I noticed the glow plug light flashing, but no start. After a wait of about 5 minutes, the engine started & ran OK, for about a week. Just the other day, the same happened twice. The first time the engine was hot & had been switched off for about an hour. the engine would not start. Again after waiting about 5 minutes, the engine started OK. Later on the same day the engine stopped while driving. After a few minutes, I heard the central locking operate (not by me), & the engine started OK. I have done about 120 mile since, & all OK
Your answer would be most welcome