Security fence surrounds work at the Citibank building which is undergoing a major refurbishment at the heart of Canary Wharf financial district on 15th August 2023 in London, United Kingdom. The Citigroup Centre houses Citigroups EMEA headquarters. Canary Wharf is an area located near the Isle of Dogs in the London Borough of Tower Hamlets and is defined by the Greater London Authority as being part of Londons central business district. Along with the City of London, it constitutes one of the main financial centres in the United Kingdom and the world, containing many high-rise buildings including the third-tallest in the UK, One Canada Square.