30 St Mary Axe architecture banking District blue sky British British (places and things) building building (structure) building exterior city city hall City of London cityscape cloud color image color photography color picture day England English English (places and things) Europe European European (places and things) financial district fountain Gherkin Gherkin Building government building Greater London highrise hi rise image Jason Friend London More London multi-storey building no people outdoors photograph photography picture sky skyline Southwark stock photograph stock picture urban view from water