Through the 1980s he was repeatedly unsuccessful in his applications to study painting at degree level but continued painting whilst studying art history with the Open University and learning painting technique from older painters he knew in the west of England.
From 1992, he exhibited across Britain. Since 2007 he has also exhibited in the United States of America, Germany, Italy and France. His paintings have been shown in numerous solo and mixed exhibitions. Notable solo shows include ‘Purgatorio’ at Brooklynite Gallery New York, ‘Inferno’ at MAGI’900 Bologna and ‘Behemoth’ at St Martin in the Fields London. His work is held in several public collections, including the Politics Department of Bristol University, the Political Science Department at Galway University and the MAGI’900 Museum of Contemporary Art, Bologna.
He has also been invited to work on a variety of community urban art projects and has developed a distinctive style that builds images from drawing and stencilled text.
In 2007 he moved to Finistere in France where he continues to work towards future exhibitions; since 2010 he has posted a drawing every day on his blog http://denningdrawing.blogspot.fr/