Beynon was born in the inner Melbourne suburb of Carlton in 1925.
He was educated at University High School and studied phonetics at the Albert St Conservatorium.
[1] He went to England in 1947 and joined a repertory company on the Isle of Wight.
His best known work as a playwright is The Shifting Heart which premiered in Australia in 1957 and the United Kingdom in 1959.
He later worked as a BBC television producer on shows such as Z-Cars and The Duchess of Duke Street.