Hi all thanks for your comments, it has lost the spark when non starting, has new coil and ckp, had the ecu checked that has come back as ok, as i thought the ignition amp in ecu might be at fault and that is how it feels on the road when fault happens. Customer has updated us with more of the story from it now (as not telling you might make it cheaper ) the "AA" had put a new rotor in when it first went wrong and it had then been ok for a while. So i will change rotor and dissy tomorrow and see what happens. Thanks again for help so far..