With the establishment of the military Aeroplane and Armament Experimental Establishment at Boscombe Down in 1939, Amesbury began to expand.

One aircraft remained flying with the Aeroplane and Armament Experimental Establishment at Boscombe Down until 24 January 1975.

While attached to the Aeroplane and Armament Experimental Establishment, AM912 was damaged on landing on 16 May 1941 and not repaired.

The Aeroplane and Armament Experimental Establishment (A&AEE) at Boscombe Down found this unacceptable.

It next was moved to the Aeroplane and Armament Experimental Establishment where it was modified to be used as a water-spray tanker aircraft for de-icing trials.

It spent a period of assessment with service pilots at the Aeroplane and Armament Experimental Establishment, Boscombe Down.

The Aeroplane and Armament Experimental Establishment (A&AEE) was a research facility for British military aviation from 1918 to 1992.

It then went, after some modifications to the Aeroplane and Armament Experimental Establishment at Martlesham Heath for trials in the specification competition.

The first Nightjar was delivered for evaluation by the Aeroplane and Armament Experimental Establishment in May 1921.

It was delivered to Martlesham Heath for evaluation by the Aeroplane and Armament Experimental Establishment on 12 December 1929.