Painter and artist in collage, born in Blackheath, southeast London, where he mostly lived. After a series of administrative jobs in 1959 resigned from the Civil Service to paint full-time, although he had only studied for a short period in the evenings from 1955 at Chelsea School of Art. Christopherson became attracted to the art world at the time of the 1951 Festival of Britain, when he began collecting modern paintings and sculpture. His influences were many: pictorial, literary and musical, especially the music of Debussy and Ravel. Encouraged by Jean Dubuffet, Victor Pasmore and Anthony Caro he began showing at mixed exhibitions at the Leicester, Redfern and Mercury galleries. He had a one-man exhibition at the Hyde Park Gallery in 1961, followed a string of solo shows at such galleries as ICA, Marjorie Parr and England & Co, which gave him a memorial exhibition in 1997.