[2] While attending Stowe School, Banbury rejected his father's naval background by refusing to join the Officer Training Corps, later being registered as a conscientious objector, enabling him to continue acting throughout the Second World War.
[4] He trained for the stage at the Royal Academy of Dramatic Art alongside Joan Littlewood, Rachel Kempson,[3] Robert Morley, and Peter Bull.
[2] The papers of Frith Banbury were purchased by the Harry Ransom Center at the University of Texas at Austin in the 1990s as part of their extensive holdings of contemporary British theatre.
The archive consists of over sixty boxes of scripts, correspondence, posters, programs, photographs, publicity clippings and scrapbooks, reviews, and financial records pertaining to his career from 1926-1995.
[7] The Ransom Center also holds a collection of material relating to the 1952 American production of Terence Rattigan's The Deep Blue Sea, which was directed by Banbury.