Strangely, I believe that despite the very strict U.K. gun laws, it may be possible and legal, under certain circumstances, for a private citizen to own a self propelled gun or main battle tank with a live gun. I don't know the ins and outs of how this may be possible or under what restrictions/conditions would be imposed or even if I'm correct in this matter. Perhaps someone with more knowledge of the U.K. laws/regulations could correct or confirm, please?