There is a great interview with Chris Dorley-Brown ongreatleapsideways:
“When I started photographing in London, I was aware that I was witnessing the tail end of an era that had begun in the 19th century, essentially an industrial and manufacturing revolution. The docks had just closed and really only the rag trade was a visible London industry, but the old buildings did remain and many were being inhabited by artists and photographers because they were relatively cheap, large and flexible in terms of potential, so it was natural to photograph this phenomena. It seemed to be a world that was fragile and vulnerable, something worth preserving if only by making a photograph.”
— from an interview with Chris Dorley-Brown, up here.