Tom, Messy, Having spoken with someone who would tell me; There are people in DFRS/DFRMO who conduct the FRA on behalf of the RP/occupier. There is a seperate branch of fire officers, the Defence Fire Safety Regulators, for audit and enforcement purposes. The RP is still the RP as identified by the RR(FS)O 2005 who, is usually the commanding officer - this is across army, navy and airforce sites (ships classed as at sea excepted I believe).
DFRMO already consists of civil servants, RAF military and contract fire services. All parts are in consideration to be contracted (except navy aircraft handlers) - whole or parts.
Colin, I made enquiries and have been assured that you have not been left out - there is a space for your motor reserved!! (however, the spot marked CO, is not short for Colin!)