I have just found out that Colin O'Brien has passed away. For those who do not know him, you owe it to yourself to see his work. He shot England in the 1950's and since he came from a humble home he was able to shoot a part of London that most never knew.
Here is his website. He has a couple of books for sale here but even if that is not your thing, just have a look at his shots. The one above was his first shot that he took as a kid and it is what brought him into the world of photography.