Superb 2 engine kill and non start - esp fault

[ashwhite88]

I have a 2008 skoda superb 1.9tdi. Recently, whilst driving along the engine will die with the glow plug light light and esp fault pinged up with the esp light then lit. Sometimes a simple key flick will totally cure the issue, but occasionally when you try to start the car it will say esp fault and will not fire, just turning over.
I can't find no similar problem anywhere on the Internet, had a garage look at it but they couldn't find a fault.
Any ideas?

[niall campbell]

Have you had a scan when the ESP light is on ?