One Canada Square Canary Wharf Management Ltd are responsible for the maintenance of the building. There are about 130 in-house and contract staff who maintain, manage, secure and clean the building. There are normally ten maintenance personnel on-site during working hours and three at night to attend to routine repairs and adjustments to the internal environment. Critical spare parts for the electricity, gas and water systems are kept within the building. One Canada Square has been 'named and shamed' for being the top building to leave the lights on unnecessarily. The research carried out by the BBC's "Inside Out" programme found that on
5 Canada Square with 25 Canada Square, another Canary Wharf building, for a total of £1.1 billion from Canary Wharf, a major property firm that developed the facility. 5 Canada Square was originally leased by Credit Suisse First Boston but after a banking downturn and not needing the space, Credit Suisse let the space to Bank of America. In July 2007, the building was sold by RBS to Evans Randall, a banking firm, for £452 million, making it the firm’s largest UK investment to date. In 2011, Bank of America chose to renew its lease at 5 Canada Square instead of move to