His work spanned five decades and included creating the ITV police drama series The Gentle Touch (1980–84) and its spin-off C.A.T.S.
However, he quickly outgrew the publication, and moved to London where he secured a position in the faster-paced world of Fleet Street, joining the editorial staff of the Sunday Graphic.
Feely was also instrumental in bringing James Mitchell's Callan to the small screen, for which he is credited as associate producer.
He joined the British subsidiary of Paramount Pictures in 1967, and was partly responsible for ensuring the production of If.... (1968), directed by Lindsay Anderson.
In the 1970s he worked on shows such as The Persuaders!, Arthur of the Britons, The Protectors, UFO, Space: 1999, Thriller, Within These Walls, and The New Avengers.
Aside from his work as a screenwriter, Feely also penned several novels including Number 10: Private Lives of Six Prime Ministers, which also became an acclaimed drama series in 1983.