 It was a twin-engine, low-wing monoplane with a retractable undercarriage, and a tailwheel.Although only two were produced, it formed the basis for the successful Avro Anson.In 1933, Imperial Airways issued a specification to Avro, for a light airliner to transport four passengers for up to 420 mi (676 km) at a cruising speed of 130 mph (210 km/h).