Antony Cairns is an artist stretching the boundaries of the photographic medium. Cityscapes, from London to Tokyo, feature as a backdrop for his investigation into the tool of photography. Fascinated by its reproductive nature, Cairns explores never-seen-before processes and formats to create his work. We followed one of his evening trails through Old Street in London, joined him the darkroom and camped out in his studio. On the journey he told us how a simple project based on London would inspire over a decade of work.