Chichester Festival Theatre in construction, showing the installation of the pre-cast concrete that would form the back half of the auditorium. This would be cantilevered over the entrance to the foyer below, fully supported by rings of concrete that would later be installed around the sides of the auditorium. Once the building was complete the wooden props (such as the large pillar that can be seen in this photo) were removed and the building allowed to adjust under its own weight.
Photographer unknown
CFT archive held at West Sussex Records Office