The Bristol F.2 Fighter was a British two-seat biplane fighter and reconnaissance aircraft of the First World War developed by Frank Barnwell at the Bristol Aeroplane Company. It is often simply called the Bristol Fighter, other popular names include the “Brisfit” or “Biff”. Although the type was intended initially as a replacement for the pre-war Royal Aircraft Factory B.E.2c reconnaissance aircraft, the new Rolls-Royce Falcon V12 engine gave it the performance of a two-seat fighter. Despite a disastrous start to its career, the definitive F.2B version proved to be a manoeuvrable aircraft that was able to hold its own against single-seat fighters; its robust design ensured that it remained in military service into the 1930s. Some surplus aircraft were registered for civilian use and civilian versions proved popular.