COMMON VAUXHALL FAULT. check you fuel pump relay, it it jammed open your pump wouldnt work thus no start, when it frees its self your engine will start up again fine. mine has done this a few times now.. Then again i could be totally wrong and you could have a loose connection on your fuel pump.
remove one lead of no 1 cylinder run it if it sound s worse reconect it as that cylinder is obviously firing, then repeat for all the cylinder untill you find one that doesnt make a difference to the engine note and that is the cylinder that the problem lies, then check plug and lead on, if that doesnt work the chances are its something mechanical. hope this helps.