AIR 341916-1952Air Ministry: Central Interpretation Unit, predecessors and related bodies: Reports and Photographs
Reports of the Central Interpretation Unit (later Allied Central Interpretation Unit) and of its predecessors the Photographic Development Unit and the Photographic Interpretation Unit. The reports, which were based on aerial photographic reconnaissance, were compiled mainly at RAF Medmenham. There is also material from overseas centres relating particularly to operations of the Mediterranean Allied Air Forces. The series also includes photographs of the Joint School of Photographic Interpretation. Apart from a First World War album of aerial photographs none of the pieces in the series are earlier in date than 1939.