Artist and teacher working in a wide range of media, born in London, who attended Stowe School, 1931–3, then through his mother became connected with the Bloomsbury Group. In 1935–6 studied biology at Chelsea Polytechnic, and was active in the Group Theatre with Rupert Doone and Robert Medley. While assisting Helmut Ruhemann the picture restorer Henderson, with the encouragement of Peggy Guggenheim, developed as a Surrealist painter and collagist, showing at Guggenheim Jeune. After serving as a pilot in Coastal Command in World War II Henderson suffered a nervous breakdown, but recovered to study at Slade School of Fine Art and experimented with photograms using bomb site debris. In the early 1950s Henderson combined teaching creative photography at Central School of Arts and Crafts with photojournalism for Flair, Architectural Review and Melody Maker and did posters for jazz musician Ronnie Scott.