Due to its unusual hyperbolic paraboloid shell roof, constructed in 1960-61 to designs by architect Hugh Segar (Sam) Scorer and structural engineer Dr Hajnal-Kónyi, there was a preservation campaign in 2004 to get the building listed to prevent it from being demolished as part of the Markham Moor junction improvement plans published by the Highways Agency.
Janney performed more than 60 scale-model studies from 1958 to 1969 on many important structures, including Chicago’s First National Bank, the Kodak Pavilion at the 1964 New York World's Fair, and the hyperbolic paraboloid roof for TWA’s maintenance hangar in Kansas City, Missouri.
The building is described as having a 'hyperbolic paraboloid' form; the design is similar to the Absolute Tower in Mississauga and Turning Torso in Malmö, Sweden.