The Heron Tower (officially 110 Bishopsgate) is a commercial skyscraper in London. It stands tall including its 28-metre (92 ft) mast ( excluding the mast) making it the tallest building in the City of London financial district and the third tallest in Greater London and the United Kingdom, after the Shard in Southwark and One Canada Square at Canary Wharf. The Heron Tower is located on Bishopsgate and is bordered by Camomile Street, Outwich Street and Houndsditch.