- Role: Trainer
- Dimensions: Wingspan 10.36 m, length 8.04 m, height 2.92m
- Engine: 1 x Armstrong Siddeley Lynx IVC (215 or 240 hp)
- Crew: 2
- Number in service: 59+
- Country of production: Great Britain
- Years in service: 1936 – 1941
The British Avro 621 Tutor was chosen as the basic training airplane in the Air Force reconstitution program in the period between 1936 and 1940, prevailing in a competition held by the Ministry of Air Force in 1935, with the D.H. Moth II being the second choice.
Thirty british-built airplanes were delivered in 1936 and 62 more were to be domestically produced. In December of 1939 59 Avro 621 were available, while 30 more airplanes were under production at the State Airplane Factory, the production line pace being about 7 airplanes per month. In documents of this period is noted that many training squadrons were “under composition”, waiting for their airplanes to be delivered.
Many of them were re-fitted to be able of inverted flight, while others were equipped with night illumination instruments or target towing equipment. Their use also included acrobatics training, night flying and weapons training. A small number of Avro 621 Tutor was incorporated to the combat squadrons at the outbreak of WWII, where they undertook liaison airplane duties. At least 4 Avro 621 escaped to Egypt.