After leaving school, White pursued a career as a stage actor in London. Initially, he supported himself with a clerical job while performing with the Tavistock Repertory Company (now the
Tower Theatre Company). During
World War II, he served in the British Army in
Signals; following the
end of World War II in Europe, he did the remainder of his service acting in plays produced by the
Army Bureau of Current Affairs. On being
demobilised in 1946, he made the transition to full-time professional acting. In 1951 he was one of the original leads of
Christopher Fry's
A Sleep of Prisoners, alongside
Denholm Elliott,
Stanley Baker, and
Hugh Pryse. From acting he turned his hand to directing, which led to his career as a television producer. In 1957, White directed several plays at Toronto's
Crest Theatre, where
Patrick Macnee had acted: ''
Hobson's Choice, See How They Run, Janus and Bright Sun at Midnight''. In 1957, he completed a training course for television producer/directors run by the Canadian
CBC Television. In 1960,
Sydney Newman, a former CBC producer who had moved to Britain to work for the
ITV contractor
ABC Weekend TV, invited him to join the company as an associate producer. White's credits include
Police Surgeon and
The Avengers, which he co-created with Newman, as well as many episodes of the anthology series
Out of This World,
Armchair Theatre and
ITV Playhouse. A few years before he died he narrated summaries of lost episodes of Series 1 of
The Avengers to accompany reconstructions based on
tele-snaps and production stills. ==Memoirs==