I will be driving along, the glow plug lights come on and the engine cuts out. I have about enough time to pull over before the car stops completely. If I restart the engine, it goes no problem and drives well generally. It has only happened when I've been slowing down and most of the times it has been when I've been going around 20/30 mph.
It's worth mentioning that I've been driving an automatic for a number of years and I'm not used to driving a manual car.
A friend plugged it into the diagnostics and it didnt bring up an error code but he did not have time to look at it properly.