Renzo Piano's 2012 London tower — 310 m faceted glass shard tapering to a point. Tallest in the UK.
From Wikipedia
The Shard, also referred to as the Shard London Bridge and formerly London Bridge Tower, is a 95-storey mixed-use development supertall pyramid-shaped skyscraper, designed by the Italian architect Renzo Piano, in Southwark, London, that forms part of The Shard Quarter development. Standing 309.6 metres high, The Shard is the tallest building in the United Kingdom and Western Europe; and the seventh-tallest building in Europe. The Shard replaced Southwark Towers, a 24-storey office block built on the site in 1975.