No. 15 EFTS (Elimentary Flight Training School) was formed at RAF Redhill Surrey on 3rd July 1937 & was controlled by A.G. Douglas RAFO.

The first aircraft allocated were a few tired DH 60 Gipsy Moths and later two Hawker Harts were added to the Squadron. The DH 60`s were finally replaced by Miles Magisters sometime in 1938.

Just before the out break of the Second World War the Squadron had amased 28 Magisters, 15 Hart variants, 4 Battles and 3 Ansons. When war finally broke out in September 1939 the Squadrons aircraft were ferried out, but returned to resume training at Redhill between 11th September and 6th November 1939. The following winter was gloomy and little training was carried out.