Please can someone advise.
My "T" reg Ford Focus TDDI 1.8 diesel; it has started a problem just recently.
I will be driving along and occasionally the glow plug light starts flashing.
When this happens the engine loses power. I find that if I switch the ignition on and off again, the car immediately starts again.
Sometime later the the glow plug light will flash once more and the same thing happens. So far I havent failed to get home.
I am also finding that simultaneous with this problem arising the start up in the morning is difficult. I have to turn the starter motor over for quite some time before the engine starts. So far it hasnt failed to start eventually.

Please can someone advise. Do they know what the problem is ?
Best wishes
Ian