15 Westferry Circus is a building located on the upper level of Westferry Circus, Canary Wharf. Construction began in November 1998. Its finish marked the completion of the Westferry Complex, the westernmost point of Canary Wharf. The building was designed to fully incorporate the requirements of the tenant, Morgan Stanley, Morgan Stanley Dean Witter, who also occupied the adjoining building. Their lease began in March 2000, the same month Citigroup leased 25 Canada Square. Morgan Stanley Dean Witter sublet the building to Tube Lines. They share the building leading to the video wall, built for use in stock trading but used as a Recovery Silver Control for the London Underground in the aftermath of the 7 July 2005 London bombings. In 2013 Morgan Stanley vacated the building and it was taken over by London Underground, who had taken over Tube Lines. London Underground vacated the building in 2017. 15 Westferry Circus serves as the fifteen mile (24 km) marker in the London Marathon. The ownership of this building was the subject of a protracted legal dispute in Ireland in 2012. As of 2018, Morgan Stanley is once again occupying two floors of the building, with another floor sublet to a tenant.

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Office buildings in London Buildings and structures in the London Borough of Tower Hamlets Canary Wharf buildings Office buildings completed in 2001 {{london-struct-stub