thanks again boys, got him out the shit anyhow. had a text to say it fired up straight away this morning and got him to work!
on another note while thinking about it, a guy round the corner has a 51 plate megane scenic.. that thing doesnt start easily, they often have to lock/unlock it a few times before it starts.
so that one does sound like the immobiliser??
ill pass on the crank sensor info to him just incase