Duncan Campbell (born 1952) is a British freelance investigative journalist, author, and television producer. Since 1975, he has specialised in the subjects of intelligence and security services, defence, policing, civil liberties and, latterly, computer forensics. He was a staff writer at the New Statesman from 1978–91 and associate editor (Investigations) from 1988–91. He was prosecuted under the Official Secrets Act in the ABC trial in 1978 and made the controversial series Secret Society for the BBC in 1987 (see Zircon affair). In 1988, he revealed the existence of the ECHELON surveillance program.