Birmingham University Air Squadron was formed on 3 May 1941, providing pre-entry training to undergraduates who were joining the RAF to fight in the Second World War. Its first intake started initial officer training in October 1942.
The Squadron first flew de Havilland Tiger Moth Mk 2s, British biplanes operated by the Royal Air Force as training aircraft. The first flights of UBAS students were in October 1946 at RAF Castle Bromwich, to the north-east of Birmingham.