Before it became HMS Wildfire, it was ACHQ (Area Command Headquarters) Nore Command. The bunker, now under the car park of the new (ish) Mid Kent College, was shared between the Royal Navy and the RAF. RAF Gillingham was the name of the RAF Establishment which shared the bunker. The accommodation for the RAF Personnel was in a small barracks which stood on the site of the college, the Naval accommodation for the men was in the Prince Arthur Road Barracks across the road and the Wrens were housed in the Medway Road Barracks, located down the road in the grounds of Admiralty House. As Cosmo correctly states, RAF Gillingham was the name given to the Headquarters of No16 Group Coastal Command, RAF. Although Coastal Command was part of the RAF, it was under the operational control of the Royal Navy, so it made sense to co-locate the headquarters.