She dropped out of college and worked at Petticoat magazine and then joined the Daily Mail as deputy fashion editor in 1969. In 1971 she became fashion editor for the Evening Standard. Porter has also appeared on episodes of the TV series The London Weekend Show, 6 O’clock Show, Call Me a Cabbie, The F Word, The Wright Stuff, This Week, and Have I Got News for You. She has worked as an executive producer on the TV series Get Fresh and Great Railway Journeys. Janet has been married four times.
