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Built between 1988 and 1991, One Canada Square is a 235 metre tall 50 storey skyscraper, containing offices for the financial sector. As of 2009 it is the tallest in the UK, however 4 new buildings are due to surpass it in the near future.

Canary Wharf is a major business district. It is one of London's two main financial centres – along with the traditional City of London – and contains many of the UK's tallest buildings, including the second-tallest, One Canada Square.
Around 90,000 people work in Canary Wharf and it is home to the world or European headquarters of numerous major banks, professional services firms and media organisations including Barclays, Citigroup, Clifford Chance, Credit Suisse, HSBC, J.P. Morgan, KPMG, Morgan Stanley and Reuters.
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