Royal Canadian Air Force Station London

Originally opened at the Crumlin Airport on 24 June 1940 as the home of:

No. 3 Elementary Flying Training School and

No. 4 Air Observer School of the British Commonwealth Air Training Plan.

The expansion of No. 4 AOS necessitated the closing of No. 3 EFTS on 3 July 1942. By the time No. 4 AOS closed in December 1944, 4439 students had graduated from the school.

RCAF Station Crumlin remained open after WWII, eventually becoming part of the post-war RCAF. The name of the station changed to RCAF Station London.

Several RCAF Auxiliary units formed at RCAF Station Crumlin, including:

420 (Fighter) Squadron of the RCAF Auxiliary. In September of 1948, Crumlin became home to 420 Fighter Squadron (Auxiliary), flying first Harvards, then Mustang fighters and for a short time Thunderbird jet fighters until disbanded on 1 September 1956.

MU 4004, a Medical Unit

2420 AC&WS All of the Auxiliary ACWUs achieved Squadron status on 1 December 1953. On 1 July 1956 RCAF Air Defense Command reformed 2420 Aircraft Control and Warning Squadron (Auxiliary), training Fighter Control Operators. As the ACWUs were created for, and occupied with air defence, it was decided that these squadrons would report directly to Air Defence Headquarters. This change came into effect in October 1958. All were to share the same fate with the coming of SAGE. As SAGE was an automated system and all auxiliaries were trained with the manual system only, It was decided that they could no longer augment the Regular Force and would not be trained to operate SAGE as a cost-cutting measure. All Auxiliary Aircraft Warning & Control Squadrons were disbanded by the end of 1961 after performing more than a decade's worth of valuable and much appreciated service.

22 Wing (Auxiliary) formed in 1956

3049 Technical Training Unit of the RCAF Auxiliary.

NATO Training & Induction School (in 1950). Airmen from Norway, West Germany, Italy, Netherlands, Denmark, Belgium, Portugal and Turkey arrived for three month courses. English language training for up to 12 weeks was added. The graduates went on to elementary flying training at Centralia. The NATO school re-located to RCAF Station Centralia in 1959.

RCAF Station London became the home of the
No. 1 Officers School in 1951. At the Officers Selection Centre, trainees underwent Air Force indoctrination prior to undertaking flying training elsewhere. Later known as #2 Personnel Selection Unit (Officers) (2 PSU(O)

After being abandoned by the RCAF, various uses were made of the building complex. For a time, they housed a Veterans Hospital, a morgue, and the hangars were used to store military aircraft.

The former station is now theLondon International Airport(CYXU). Two buildings from the WWII era remain: one of the original hangars and

the Air Force Association of Canada, 427 (London) Wing Building which began life in 1940 as an Airman's Canteen.