The Gloster Javelin is a twin-engined all-weather interceptor aircraft designed and produced by the Gloster Aircraft Company. It was operated by the Royal Air Force from the mid-1950s until the late 1960s and was the final aircraft design to bear the Gloster name. The Javelin was designed in response to specification F.44/46 during the late 1940s and early 1950s as high-performance night fighter capable of all-weather operations.