[3][4] From 1989 to 1972 he was a visiting Lecturer at Nova Scotia College of Art & Design (NSCAD).
Returning to the UK he became a Senior Lecturer at Maidstone College of Art where he was tutor to Stephen Partridge and David Cunningham, amongst others.
He also took part in numerous group shows, from the First Day Covers exhibition in what was then the Newlyn Orion Gallery, in 1980, to Artists Against Apartheid at the Royal Festival Hall in 1985.
[2] With his close friend, the painter Peter Lloyd Jones, Upton founded the performance art group London Calling, based at the Institute of Contemporary Arts in London.
He lived for many years in Mousehole, Cornwall, and died in Truro on 20 September 2002, aged 64.