Mk4 1.4 stalling for no aparant reason

Hi, I have a 2000 Mk4 1.4 Golf which has started to become a tad lumpy of late, but nothing worse than most Golfs I think. However it has now developed a trick where the engine simply turns off whether idyling or driving. The ignition lights are still on the dash board but I need to restart the car. Aside from that it runs normally?

Anybody know if this is a common fault.

Simon