The Gloster Nighthawk aka Gloster Mars VI was a continuing development of the ABC Dragonfly powered Nieuport Nighthawk. Gloster took over the design as the Gloster Mars which evolved into the Sparrowhawk. Either powered by Bristol Jupiter or Armstrong Siddeley Jaguar radials, 29 Nighthawk/Mars VIs converted from Nieuports. Jupiter engine in photo. Three of the 29 were sent to Iraq for testing by 55 Squadron in 1923. This photo is believed to be one of that trio. Photo from: D.W.F Bonham-Carter DFC (via Jim Cownie)

Gloucestershire Aircraft changed its name to the simpler Gloster in 1926. The Sparrowhawk was a development of the Nieuport Nighthawk for the Japanese Navy. The Mk.I was a single seat fighter, the Mk.II a trainer, the Mk.III a carrier aircraft. Japan acquired 90 aircraft, some built locally. Photo from: Civil Aviation Historical Society, Melbourne, Australia