Bracknell in 1970. A still preserved reminder of the RAF Staff College on the former airfield is a headstone from 1926 on the North Site marking the grave of Jane. She was a dog belonging to the first Commandant Robert Brooke-Popham. The formation of the Royal Air Forces Association followed a conversation in 1929 in the Sergeants' Mess of RAF Andover. RAF Andover continued to be used for a variety of aeronautical research and flight testing. As part of this, several experimental military aircraft made their first flights from the airfield. Amongst them were the Westland Yeovil; the Westland Witch; the Westland F.7/30; and all of the Westland-Hill Pterodactyl series of experimental flying wing aircraft. Two experimental bomber squadrons were based at RAF Andover in the late 1920s and early 1930s, No. 12 Squadron RAF and No. 101 Squadron RAF. No. 13 Squadron was also based here for five years between 1924 and 1929, operating Armstrong Whitworth Atlas aircraft. No. 12 squadron operated Fairey Fawn light bombers from March 1924, and later the Fairey Fox bomber, which was significantly faster than its contemporaries. To this day, 12 Squadron's unit motto 'Leads the Field' and crest commemorates their time at RAF Andover by depicting the head of a fox. The Fairey Fox was the first all-metal aircraft in operational service, and 12 Squadron was the only squadron to operate it. The aircraft was a private venture by Fairey, which had been demonstrated to the Squadron secretly during an 'At Home' at RAF Andover in 1925, when the Fox appeared in Royal Air Force markings and 12 Squadron colours. During the Air Defence of Great Britain exercise in 1928, the Squadron was tasked with the simulated bombing of London. To commemorate 12 Squadron's success in the exercise, the Commander in Chief of the Royal Air Force chose a fox's face as the Squadron emblem. A typical annual training programme for 12 Squadron consisted of individual training in the autumn, working up to Squadron training in the summer consisting of bombing, formation flying, navigation exercises and gunnery. Experimental trials carried out included some limited night flying and the introduction into service and testing of parachutes for aircrew. This involved a number of practice jumps being performed by observers, who would climb out of the aircraft onto a small ladder and await a signal from the pilot as the aircraft flew over the airfield