From 1965-79 he was a lecturer at St Martin’s School of Art and was involved in the borderline infamous pedagogic experiment, The Locked Room, in which fresh undergraduates were locked in a room all day and made to work with only one material and no instruction.

From 1970 his work underwent dramatic change, becoming more conceptually orientated. He moved to NY in 1979. His work through the 1980s can be partially described as combining the playful forms of his earlier work and the conceptual inclinations that followed. He is also well known as a draughtsman.

The work of Garth Evans is in many important collections including the Arts Council of Great Britain, the Gulbenkian Foundation, Lisbon and the Metropolitan Museum of Art, New York.