Born in apartheidSouth Africa, Duke began writing as a trainee journalist in his teens for The Springs Advertiser in 1964. After completing a course in photojournalism in 1967, he moved to The Star newspaper in Johannesburg working as an investigative journalist and The Star's chiefcourt reporter. In 1973, Duke moved to the UK, where he continued to write anti-apartheid pieces for Argus Newspapers. In 1974 Duke joined publishing companyBroadstrood Press whilst beginning to write regularly for The Freethinker. Leaving publishing in 1980, Duke began working as a public relations executive for British Transport Hotels. When the company was privatized, Duke left in 1983 to work for Citigate Publishing and pursue freelance work. In 1996, Duke left Citigate to look after a terminally ill partner, but continued to write freelance. In 1997, Duke took over as the interim editor of The Freethinker, following the death of previous editor Peter Brearey. After six months, Duke was confirmed as the editor, and remains so to this day. In 2011, Duke took on the additional role of editor of , published by the Pink Triangle,
Activism
Duke was involved in the Anti-Apartheid Movement and on arriving in the UK as a refugee from South Africa continued supporting the African National Congress. Duke strongly opposed the Nationwide Festival of Light, and worked alongside The Freethinker and National Secular Society to try to counter its effects and influence. In 1979, Duke was a founding member of the Gay Humanist Group, after Mary Whitehouse began a private prosecution for blasphemous libel against Gay News After the founding of the Gay Humanist Group, Duke was very active in the promotion of gay and atheist rights and was also briefly the treasurer of the NationalSecular Society. In 2010 he relocated to Spain and in 2017 was by the NSS. In the same year he was married to his partner of 20 years, Marcus Oliver Robinson, in Gibraltar. He currently writes a weekly column for , an English paper published in Spain.
