In March 1933, the firm moved to Portsmouth where the City Council gave generous terms for a factory building constructed to Airspeed's requirements at the local airport. The first Airspeed Courier was flown from there in 1933, followed by the first of a twin-engined development of the Courier, the Airspeed Envoy, in 1934. Both the Courier and the Envoy were made in small numbers. In the same year, a long-range racing version of the Envoy, the AS.8 Viceroy, was developed for the England-Australia MacRobertson Air Race.