XF375 first flew in August 1955 and served with Rolls Royce as Avon 203 engine test-bed, before going to the English Electric Company at Warton for Lightning trials work. In late 1962 she was assigned to the Empire Test Pilots School at Farnborough.
T.10 WD321 served with the ETPS at Boscombe Down until early 1975. Converted to Chipmunk 22 and registered G-BDCC to the Coventry Gliding Club, the Chippie was damaged beyond repair in a forced landing at Husbands Bosworth on 29th August 1999.
Delivered to Boscombe Down in February 2011, the extensively modified QQ100 trains ETPS test pilots as well as flight test engineers in a flight engineer station in the main cabin. QQ100 is seen here working at the Everleigh DZ.