2009 2.2 Manual.
Just randomly started doing this -
Cold start.
Put key in recepticle, (ignition off) i notice clock on radio cycles on and off. Maybe 1 second cycles.
Press start button, engine starts and runs for maybe 1 second then cuts out. Repeat and happens again.
Take key out and lock car. Open it and repeat procedure. Starts and runs fine with no further issue. Doesnt seem to happen when cold or after engine been running a while.
Any ideas?

Has happened last two morning. Ambient temperature 17deg so cant be glow plug related? No module on this car anyway i believe.