You were on your way to the camp you had been ordered to, but you suspect that you must have taken a wrong turn somewhere — easy enough to do with so many signposts taken down in case of a German invasion. Then just to cap it all, your car has just broken down, leaving you stuck out in in the middle of nowhere (or somewhere on the outskirts of Salisbury Plain, which amounts to much the same thing), still miles away from where you’re meant to be.