This episode comes from the 19th-century Highcliffe Castle in Dorset, which has been restored with all kinds of ingenious methods. Adam Partridge and Phillip Serrell are the experts, and finds include an untouched World War II ration pack and a piece of modern design by Eduardo Paolozzi.
Presenter Paul Martin goes to Blandford Forum Camp to find out about the remarkable work of the Royal Corps of Signals since World War I.