F. G. Miles developed the Avro Baby into Martlet and Metal Martlet light aerobatic and sporting types. Last example flew 1931.
Southern Aircraft Martlet Article
The first Martlet G-AAII was a modified Avro Baby powered by an 85 hp ABC Hornet. Development of the type was by the Miles Brothers, D L Brown and H Hull at Shoreham and it was first flown in August 1929. During the following two years five Martletts were built; G-AAVD, G-AAYX, G-AAYZ and G-ABIF, all with different specifications and various powerplants. It was to have been succeeded by the Metal Martlett in 1931 but this machine was scrapped after a limited amount of flying.
All Aero 