The monument comprises the standing remains of a control shelter for a World War II bombing decoy site, and the base of an associated Nissan hut (a temporary hut used during the war). This is a Scheduled Ancient Monument, protected by law (1).

World War II bombing decoy control shelter 600m South East of Great Burdon Farm. The site was officially designated Darlington 40a, Great Burdon, and certainly operated between August 1941 and April 1943. The monument includes the control building, Nissen hut and guard house, although the the site of the decoy fires and their enclosure have not been identified. The main decoy is recorded under {D70450}.