The Open House London website explains that, "... Its purpose as a garage for the automobile and the necessary ramps allowing cars access to the upper levels are clearly visible from the facade. The sloping ramps of the northern block are reflected in the curved walls and angled horizontal windows." 

The entrance to the garage, and the ramp that took cars to the upper floors, can be seen below beneath the McCann sign.  Today it is closed off with a large window and revolving door entrance.

"Between the ramps the central core of the building provided parking on four levels. Here taxis were serviced and washed while their owners relaxed in the canteen. A central stair tower gave pedestrian access to the upper floors.  ...

... In October 1998 work began to begin to remodel the interior into offices with an additional fourth floor on behalf of McCann London, which continues to occupy the premises.  The reception area is situated in an atrium which rises to a toughened glass roof through which the sky is visible.


"On one side there is access to the semi-basement which now contains the staff canteen and audio and visual studios and on the other the spiralling ramp which was a roadway for vehicles now contains work spaces and stairs to the extensive open plan offices on the upper floors.  .....





.... A roof terrace between the third and fourth floors is used for meetings and community events and looks out towards Marchmont Street to the east and St Pancras to the north."