I watched bemused as a Corporal (acting, unpaid, with a gun, not loaded) RAF policeman put a parking ticket on the Staish's official black car with flag flying, shortly after he arrived to kick off a charity football match at RAF Gutersloh.
I don't think the "corporal" enjoyed his overseas posting much, after that.., especially as he told the Group Captain (Mike Stear IIRC) to report to the guardroom first thing on monday morning (I don't think he waited that long)