The Central Flying School (CFS) is the Royal Air Force's primary institution for the training of military flying instructors. Established in 1912 at the Upavon Aerodrome, it is the longest existing flying training school. The school was based at RAF Little Rissington from 1946 to 1976. Its motto is Imprimis Praecepta, Latin for "The Teaching is Everlasting".

Royal Air Force Upavon, or more simply RAF Upavon, is a former Royal Air Force station in Wiltshire, England. It was a grass airfield, military flight training school, and administrative headquarters of the Royal Air Force. The station opened in 1912 and closed in 1993, when it was transferred to the British Army and became known as Trenchard Lines.