It was not until the 1950s that major changes began to affect the village. During this time the Bacon-Franks abandoned Campsall Hall; it was rumoured that Mrs Bacon-Frank was growing tired of the view of Askern Colliery from the Hall. From 1956 the local authority and the National Coal Board developed a large area of housing in Campsall Park and Campsall Hall was converted into flats until 1986 when it was demolished. The Cooke-Yarboroughs had left Campsmount in the late 1930s and the building was used as a military hospital until demolition in the 1950s. A private housing estate was built during the 1970s in the grounds of Campsmount Park.