 15 Service Flying Training School RAF was transferred to the base in early June 1940 with its Oxfords and North American Harvard trainers, but it moved to RAF Kidlington at the end of August.Soon afterwards, the syllabus of 3 SFTS changed to intermediate flying training and it continued in this role until 14 March 1942 when it was converted into No.3 (Pilots) Advanced Flying Unit RAF to orient foreign-trained pilot to British conditions and standards.