At this point it became obvious that the car could be moved out of the container. It was (to all intents and purposes) a runner.
I say "could" because despite finding a handy set of ramps and being completely sure I could get the car out, I didn't fancy my chances of getting the car back in!
I'm away for work for a couple of weeks now but will return (with some friends as muscle!) to get it out in the open!