 Through the intercession of Air Vice-Marshal Sefton Brancker, they were retrained at the Central Flying School at Upavon on Bristol F.2 Fighters, Avro 504Ks, and Royal Aircraft Factory SE.5as.However, the end of World War I saw Smirnov demobilized from the Royal Air Force.When he was demobilized, Smirnov snagged a flight instructor's job through a Russian officers' emigre association.