Central Lancashire New Town was the largest of the post-war English new towns, designated in 1970 RTPI http://www.rtpi.org.uk/knowledge/networks/rtpi-cih-planning-for-housing-network/new-towns-come-of-age/central-lancashire/ and covering 35255 acres : the County Borough of Preston, parts of Chorley, Fulwood, Leyland, Walton-le-Dale, Chorley Rural District and Preston Rural District.