According to Wikipedia: "The de Havilland DH 112 Venom was a British postwar single-engined jet aircraft developed from the de Havilland Vampire. It served with the Royal Air Force as a single-seat fighter-bomber and two-seat night fighter. The Venom was an interim between the first generation of British jet fighters – straight-wing aircraft powered by centrifugal flow engines such as the Gloster Meteor and the Vampire and later swept wing, axial flow-engined designs such as the Hawker Hunter and de Havilland Sea Vixen. The Venom was successfully exported, and saw service with Iraq, New Zealand, Sweden, Switzerland and Venezuela."