A rather more interesting reflection image, making use of a reflection in both a vertical glass window and a horizontal polished marble floor, with careful lining up which makes the unusual near-horizontal strip fence around the office appear to continue seen through the window when it and the cars, buildings and the couple are in fact reflections. The corner where this picture was taken has since been altered.
 
The building was designed by Richard Seifert, also guilty for Centre Point, the Nat West Tower in the City, and many other 1960s and 70s eyesore buildings in London and elsewhere. What I called marble is probably the same highly polished black gabbro, a much harder basalt-like igneous rock, which also covers much of the face of this conspicuously ugly building. Gabbro gets its name from a town in Tuscany, but is found at many sites around the world, and the rock used on this building is from the Transvaal.