Thanks for the input folks ...

Speaking to a mate of mine who owns a garage ( altho isnt an auto electrician ) thinks the problem could possible start at the Ignition Coil , ive got a spare in the shed ive just dug out , so ill fit that and see if it happens again. Failing that it could be the HT lead from the coil to the dizzy ... possibly. Im a mechanical fitter for a living and ive been speaking to some of the other fellas at work as well as my mechanic mate and were all scratching our heads other than that , i did think that possible the fuel pump wasnt working but yesterday after regaping and cleaning the spark plugs my mate said he could hear the exhaust pur slightly for a momment , as it was trying to kick up but there was something holding it back ... ie: no spark, so i belive the fuel pump to be working fine. When it didnt start the other night coming out of work , when it did start it ran perfectly sweet as a nut , so again i dont think it is the fuel pump.

Keep the ideas surgestions coming please folks and thanks again ! all appreciated