Actually us pond-life from the Mountains of Islas Malvinas always wore caps CW (AKA Dilac) when visiting Base Aerea Gringo to avoid having to salute commissioned members of “The Queen's Own Queens” or whatever the RIC was at the time. As BEags points out, berets for the real lower orders - AAC note.
Never understood saluting in corridors either - hey ho - such is jointery