Blackfriars National Rail station is being largely rebuilt and extended across the river for 2011; until then the Underground station is closed. There is a lot of work going on above and below ground; this is one of the cranes involved.
It’s a mess at the moment, but 12 carriage trains will make it worthwhile, I’m sure!
Technical notes: Nikon D90 with Nikkor 50mm f/1.8 AF. ISO 200, 1/320 at f/11.0