The building was designed with the radio elements, such as the studios, in a central location constructed of Portland stone. The remainder of the building was steel framed and faced with Portland stone on the outside. These areas housed the offices, so that they could be both away from the noise of the radio operations, and have access to daylight. Issues with local residents also caused the structure to be changed: The east side of the building blocked out the light to local residents, and after complaints and seeking the right of ancient lights, the building was changed so that the East side of the building had a sloped roof. The building also faced issues with the fact that both the Bakerloo and the Victoria lines of the London Underground, as well as sewers 100 years old ran under the site.