The work of Sean Scully is distinguished by a remarkable commitment to the fundamental concerns of abstract art. Influenced by Mondrian, Rothko and Matisse, since the 1970s he has restricted himself to a severely reduced formal repertoire of lines, stripes and blocks. Horizontal and vertical stripes and coloured fields create an all-over structure that nevertheless incorporates a tension between repetition and contrast, balance and imbalance, and symmetry and asymmetry. His art represents an important contribution to the late twentieth-century tradition of non-objective painting. The artist talks to broadcaster Tim Marlow about his career.