Supermarine Spitfire was designed by Joseph after his colleague died in 1937 and he oversaw its development through all its variants.
After the Battle of Britain, the Spitfire superseded the Hurricane as the principal aircraft of RAF Fighter Command, and was used in the European, Mediterranean, Pacific, and Southeast Asian theatres
 Many variants of the Spitfire were built, from the Mk 1 to the Rolls-Royce Griffon-engined Mk 24 using several wing configurations and guns

