The free Street Photography Exhibition which runs until September is well worth a visit. I went yesterday and found the audio visual presentation on street photography particular interesting covering the sorts of cameras used to how to go about street photography and how to develop an individual style. There are photographs from 1850 to the current day displayed in date order. This provides an interesting view of how London has changed over the years. What particularly struck me in the pictures from the 1940 and 50s was the lack of cars and that London is now is a much more cosmopolitan city than it was was 50 years ago.
There is a book available for £14.99 which contains many of the images featured in the exhibition