arched architecture building ceiling Collcutt curved decorated elements England english extravagant Great Britain lavish lloyd's lloyds London loyds luxurious luxury opulent ornamental ornate painted prestige prestigious prosperity register rich vaulted wealth yellow block blue city futuristic glass iconic iron landmark metal modern offices power skyscraper steel tower aluminium brown controversial gray grey historical New old silver traditional walkie-talkie windows aeroplane aircraft apex diamonds flight fly Gherkin jet plane roof top triangles autumn flower flowers green Linaria orange toadflax vulgaris ribbed ribs tree abstract angled angles appearance architectural buildings contemporary contrast contrasting corners distinctive edged edges exterior external framed frames geometric geometric-shapes height high high-rise light linear lines patterned patterns perspectives sharp sharp-cornered sharp-corners Singapore straight-up-and-down surface surfaces textured textures views wall walls