Built by Fairey Aviation Company Limited, it served principally with the Belgian Air Force throughout the 1930s until the outbreak of World War II.
[1] The Firefly II competed for the RAF contract against the Hawker Fury, showing superior speed but was criticised for having heavier controls.
A revised prototype with longer-span wings, the Firefly III was built to Specification N21/26 as a carrier-based fighter to replace the Fleet Air Arm's Fairey Flycatchers, first flying on 17 May 1929.
Although no production orders ensued, the Firefly IIIM was fitted with floats and used as a trainer by the RAF's High Speed Flight preparing for the 1931 Schneider Trophy race.
Two of the Belgian aircraft were converted to Firefly IV, with 785 hp (585 kW) Hispano-Suiza 12Xbrs engines but the improvement was not deemed sufficient to warrant development.