In the early 1960s Liverpool was one of a number of British cities at the forefront of innovation in planning. According to the Interim Planning Policy Statement (IPPS) the city centre was a focus for all Merseyside, providing shopping and wholesale distribution, entertainment, cultural facilities and employment for a hinterland of over two million people. The half of the document on the 'Future City Structure' was introduced by a chapter entitled 'A New Type of Plan'. After the approval of the IPPS, the Council published its Liverpool City Centre Plan. The Inner Areas Plan was concerned with the mixed zone of residential and industrial districts to the east of the docklands and city centre. It was in 1966 that Liverpool City Council undertook an innovative social survey of inner city residents. In all aspects of life–housing, employment and social class–it was predominantly a static population.