The building was formally opened in June 2005 by the Chairman of Barclays, Matthew Barrett, and merged Barclays offices across London into one building. The former corporate HQ was at 54 Lombard Street in the City of London.
Barclays occupy approximately 90% of the building, floors 18-20 are leased to BGC Partners/Cantor Fitzgerald.
Designed after the 9/11 terrorist attacks, the building is constructed around four staircase columns with a large, central column containing the lifts and toilet facilities. The building manual states that there is enough room in these columns to contain everyone who works in the building, in the event of a security alert.
The building was planned to be 50 stories in height, but was scaled down to 31 after the 9/11 terrorist attacks.