This is London Minus, a building of an organization where all the information about London underground is kept and shared; a medium between over and under world.
The organization researches, collects and shares all this information, which has been neglected for centuries, and shares it with developers and the public.

The site on the south of Hanover Square, a traffic island on St. George Street which sits on area of 1100m2. It stands in between
Hanover Square is surrounded with the buildings come with various physical and historical types and designed in different styles. The site and square fall into Mayfair Conservation area of Borough of Westminster.