Cost overruns contributed to populist criticism and a change of government resulted in 1966 to Utzon’s resignation, street demonstrations and professional controversy. Peter Hall supported by Lionel Todd and David Littlemore in conjunction with the then NSW Government Architect, Ted Farmer completed the glass walls and interiors including adding three previously unplanned venues underneath the Concert Hall on the western side. Opened by Queen Elizabeth II in 1973, new works were undertaken between 1986 and 1988 to the land approach and Forecourt under the supervision of the then NSW Government Architect, Andrew Andersons, with contributions by Peter Hall.