[2][6] He undertook his National Service in Kenya and worked as a teacher in the Royal Army Educational Corps from 1952 to 1955 as part of his attachment to the King's African Rifles.
[2] Stewart went to a talk organised by the producer T Lesley Jackson about a career in television at the YMCA in Brixton in south-west London in 1958.
[5][4] After the 1959 general election, Stewart began working as private secretary to Tom Driberg, the Labour Member of Parliament.
[4] Among the many shows he produced or directed were Father, Dear Father, Love Thy Neighbour, Bless This House, My Good Woman, Spooner's Patch, The Rag Trade, Family Fortunes, Don't Forget Your Toothbrush, Thirty Minutes Worth, My Name Is Harry Worth, The Reg Varney Show, The Many Wives of Patrick, and The Price Is Right.
[11][12] Stewart was a frequent contributor of media matters articles to the Broadcast, Evening Standard, Impact, RTS Journal, The Independent, The Listener, The Producer and Televisual publications.
[13] He joked that if, on an episode of Fifteen to One, too few contestants survived the first round to continue the game, he would give a speech on the Marbles to fill the time.