By September 1934, the prototype was undergoing airworthiness certification testing at RAF Martlesham Heath. Furthermore, work was progressing well on a specialised racing variant of the aircraft, the Airspeed Viceroy.
In the fall of 1934, the test model was being evaluated for air safety at RAF Martlesham Heath. Meanwhile, progress was being made on a customized racing version of the plane, known as the Airspeed Viceroy.