Polygon Centre Building Plans and Photographs Containing ground floor and first floor plans, Jan 1968, with an annotated copy of the first floor plan [c1980s?]. Scale 1/4": 1'0". Also containing two photographs of the building shortly after the building was completed, and one photograph of young people using the centre [c1968/9?]. Annotated photocopy of Ordnance Survey map showing Alfreton Hall and Polygon Centre site boundary, [late 20th century] 1968-c1990