Winner. Some of the tallest buildings in London surround the docklands at the heart of the business and financial district of Canary Wharf. As Eve Tucker walked along the wharf, a bird caught her eye. It was a black-headed gull, of which there are many in the city. But this one was resting on a very remarkable area of water. Eve realized that she was looking at reflections of the straight lines of the nearby office block, distorted into moving swirls.