Files, paper, British Railways Eastern Region Civil Defence Files, 1939 to 1950s. Files describing civil defence measures to be taken in the event of nuclear attack. The majority of the files concern the management of key railway points, the location of emergency control shelters (including Knebworth, Grantham, Wymondham and Ely), accommodation in the event of an attack, and inventories of useful plant and supplies within the Eastern Region, for example there is a very detailed inventory of plant being used for the construction of the Woodhead New Tunnel There is also a group of files which contain drawings for control shelters, and some WW2 ARP material. The material was found during the rebuilding work at King's Cross Station. Currently in 20 archive boxes.