Not to be a party pooper GBZ, but the fire standards for underground facilties are very, very close to SOLAS regulations; indeed for those who served at Rudloe Manor (yes, THAT site) and other, ahem, underground facilites would remember that much of the fire safety equipment (and the 'civilian' fire officers) were drawn from the Navy. Indeed, one site I helped to clsoe down in the late 1990s still had 'Admiralty Instruction on the Event of a Fire' posters lining the companionways.
But I agree. Baseball caps should be consigned to the sartorial dustbin of history. The TRF (spookily similar to the Gds Div patch) has sort of grown on me over the years. Roundels look a little silly on uniform - some of you will recall that they were worn on hi-viz tunics issued to the Special Safety Teams in c1995 and they looked rubbish then.