A 54-minute “essay film” that refers to IRA martyrdom, Marxist theory and anthropomorphic ketchup dispensers as it explores the value of art won its maker Duncan Campbell the 2014 Turner prize.

It was by no means a surprise. Campbell, aged 42 and probably the best known of the four artists shortlisted, had been the bookmakers’ favorite all along to take a prize created 30 years ago to “promote discussion of new developments in contemporary British art.”

His film, "It for Others," was first seen at the Scottish pavilion of the Venice Biennale in the summer of 2013.