John Bancroft's 1970s extension to the former Greater London Council's headquarters lay empty for exactly twenty years before being demolished in 2006 to make way for a hotel. Sitting in the middle of a busy roundabout at the southern end of Westminster Bridge, the County Hall Island Block was an early example of open-plan office space and could only be accessed from the outside by pedestrian subways. The building was inhabited for twelve years before the Greater London Council was abolished in 1986 and the Island Block was abandoned.