Some manufacturing was subcontracted outside the UK; the wings were made by Textron in the United States and the tailplane and control surfaces were made by Saab-Scania in Sweden.
A fabricación dalgunhas partes subcontratouse a empresas de fóra do Reino Unido; as ás fabricounas Textron nos Estados Unidos e as superficies de control Saab-Scania en Suecia.