My chosen Main Study building is the 55 Baker Street mixed-use development in central London, which is a renovation of the 1950s Marks and Spencer HQ building. Iza :)
This image was taken in October 2006 while the building was being reconstructed. It is a photograph of Level 4 showing a typical office floor following the demolition of the former floor. The existing slabs have been stripped in preparation for the casting of new infill slabs.
Source of information : Annual 3 of Make Projects Book
There isn't much detail put on my plan of the back of building because I wasn't allowed visit that part of it so therefore I do not know what it looks like. This plan shows the main entrance area including the reception and waiting areas.