[barge]

i have had a problem a few times now, car starts fine drive for approx 10-15 mins switch off car, go off and do what ever not necessaryly locking car , then return to the car and it wont start. All ign lights come on as normal transponder being read ok but car not cranking, have tried removing column shroud and having a bit of a poke around but nothing really to be seen, it always seems to happen when i have no tools on me to check voltages etc.. any ideas ???