Artist who shared an exhibition of new paintings with Rolf Brandt at Lisson Gallery in 1969, in the catalogue of which he explored the implications of hanging a canvas diamond-wise instead of in conventional rectangular mode. Drever said that his preferred territory lay “between aesthetics and logic.” He had a solo show at Galerie Fuchs, Vienna, Austria, in 1963. Other exhibitions included John Moores Liverpool Exhibition, 1965; Soundings 3, Signals, 1966; Edinburgh Open 100, 1967; 25 Camden Artists, Camden Festival, and a solo show, The Dreams of Euclid, Lisson Gallery, 1968; and Four-colour theorem, environmental project at Kenwood, 1969. The Arts Council acquired Drever’s abstract oil on canvas Negatron, 1968, other public collections holding his work including Albertina Vienna, Kulturamt der Stadt Wein and Victoria & Albert Museum.