One Canada Square of London."" One Canada Square was originally designed to be high at 55 storeys, but that penetrated the permitted projection height of the flight obstruction area of the airport approach district to London City Airport, but this was extended to a height of above kerb level in consideration of the fact that One Canada Square was on the external zone of the airport approach. To comply with air traffic safety regulations, the architects took five floors off the tower. The final height of was permitted, otherwise, the developers would have had to dismantle what was necessary to fit the height
Asia Square wealth fund, has agreed to purchase the building for S$3.4 billion. Citi is the anchor tenant for Asia Square Tower 1, giving Citi the right to external signage on the building. Tower 1 houses Citi Asia Pacific, Citi Singapore headquarters and Citi Private Bank. Other Tower 1 tenants include the global investment bank New State Corporation, the Taipei-based Global Financial Services Group CTBC Bank at #33-02, China Citic Bank International, Julius Baer, China Fortune Land Development's international HQ, the Swiss National Bank, Bank Sarasin, Lloyd's of London, Marsh & McLennan, White & Case, Booz Allen Hamilton, Royal Bank of Canada,