I notice from the media photo in CRAN's link that the aircraft has its registration in very large letters over the lower surface of the fuselage. Is this required under JAR's?
It would seem to attract the "Mr Angry" types with their 10x50 Boots binos allowing them to report low flying every time you come below 800 ft. Better to stick to the lettering on the tail booms (White on a white background works well).
Or maybe it is there to keep young PPL chaps & chapesses honest...?