The tower at Canary Wharf (One Canada Square) has 50 floors and is 800 feet (244 metres) high. It is the tallest building in Britain and fully let

The tower is an occupied office building and is not open to the public.

90,000 square feet of Italian and Guatemalan marble have been used in the 36-foot lobby.

The tower has 3,960 windows and 4,388 steps, divided into four fire stairways.

The tower has 32 passenger lifts divided into four banks, each serving a different section of the building. It also has two freight lifts and two firemen's lifts.

Lifts travel from the lobby to the 50th floor in just 40 seconds.

The building is designed to sway 13 and three quarter inches in the strongest winds that might occur once every 100 years.

27,500 metric tonnes of British Steel and 500,000 bolts were used in the construction of the tower.

The exterior walls are clad by some 370,000 square feet of Patten Hyclad Cambric finish stainless steel.

Average floor size is 28,000 square feet.

On most floors, there are 13 feet 6 inches floor heights, permitting a minimum 9 feet height from raised floor to dropped ceiling.

Four floors have an additional 6 inches for extra raised floor height for computer and heavy mechanical use.

Four floors have an additional 1 foot allowance for use as a trading floor and the top floor has an additional 2 feet.

The aircraft warning light at the very top of the tower flashes 40 times a minute, 57,600 times a day.

Over 80,000 deliveries are made to the loading bay of the tower every year.

Approximately 9,000 people work in One Canada Square