The de Havilland DH.110 Sea Vixen is a twin boom, twin-engined 1950s–60s British two-seat jet fighter of theFleet Air Arm designed by de Havilland at Hatfield, Hertfordshire. Developed from an earlier first generation jet fighter, the Sea Vixen was a capable carrier-based fleet defence fighter that served into the 1970s. Initially produced by de Havilland it was later known as the Hawker Siddeley Sea Vixen after de Havilland became a part of the Hawker Siddeley Group in 1960. A single example remains airworthy today in the UK and is displayed regularly at airshows.