Offices for 'Downstream Building', Shell Centre, South Bank, London

NOTES: Constructed in 1961 to designs by Sir Howard Robertson, the Shell Centre comprised a skyscraper tower and three nine-storey wings, formerly the 'Upstream Building', and a separate building known as the 'Downstream Building'. The latter was disposed of by Shell in the 1990s and is now a block of residential apartments known as the White House.