There is an art exhibition inside Battersea Power Station until November 5th. Whilst no photography is allowed of the actual exhibition, you can photograph this historic building at close quarters and there are architectural tours.
You must book and this is the site http://www.serpentinegallery.org/2006/0 ... 8_o_1.html
Sample photos here http://www.smugmug.com/gallery/2034930/1
I'm going to try and go, but not sure when.
Ray