This is a view from a less frequented part of the Barbican. This whole area is like an architecture-history display, but all the modern, straight lines makes it very hard to properly photograph it, especially without a tripod.
If you plan to take really high quality pictures of modern buildings, get a good tripod, a way to level both horizontal and vertical placement and potentially a lens with perspective correction options.
(Oh, by the way: this entry was written by Peter Molnar, and originally posted on petermolnar dot net.)