Painter, designer and teacher, born in Ringmer, Sussex. He studied at Brighton College of Art, 1959–63, and Slade School of Fine Art, 1963–5. Made stage designs for Royal Opera House, Covent Garden. Showed at John Moores Liverpool Exhibition from 1969, RA Summer Exhibition from 1986 and Athena Awards, 1987. Solo shows included Arnolfini Gallery, Bristol, 1983, and Newcastle Polytechnic Gallery, 1984. Taught at Central St Martins School of Art from 1981. Rhythm and pattern were strong elements in Henderson’s work, as in Arts Council’s example Gjalla, of 1979, and Juggler’s Mirror, in John Moores 1989–90 show. Was included in 5x20, “five abstract painters twenty years on”, at Kegelbahn Gallery, Carl von Ossietzky University, Oldenburg, Germany, 2001.