Painter, born and based in London, who trained at Wimbledon School of Art, 1973–7, and the Slade School of Fine Art, 1977–9. He went on to work in the technical services department of the Tate Gallery. Forbes produced paintings concerned with theories of colour and language in the manner of the Systems Group: groups of multi-coloured squares and rectangles. His work was included in A Disquieting Suggestion, John Hansard Gallery at the University of Southampton, 1988. Arts Council and Conoco Centre, Warwick, hold examples.