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
Grosvenor Square In September 2013, the Government of Canada announced its intention to sell its High Commission building at One Grosvenor Square and "consolidate its diplomatic activity in the UK in a single, central location in Canada House on Trafalgar Square". Since then, Indian real estate group Lodha has demolished the building and is in the process of creating a new, high-end residential development. Grosvenor Square Grosvenor Square is a large garden square in the Mayfair district of London. It is the centrepiece of the Mayfair property of the Duke of Westminster, and takes its name from the surname "Grosvenor". Sir Richard