Only one in every five paintings in public art collections is on display. One man is assembling catalogues in an attempt to bring the art to light. “The catalogues are both wonderful social histories and crammed full of small-scale artistic discoveries. You find yourself building little stories up about both painters and subjects; armchair travelling around places you might normally only drive through. It is like flicking through Pevsner’s counties without the small print; as English as the shipping forecast or Marmite.”