MI15, the British Military Intelligence Section 15 (now defunct), was a department of the British Directorate of Military Intelligence

Directorate of Military Intelligence

The Directorate of Military Intelligence was a department of the British War Office.Over its lifetime the Directorate underwent a number of organisational changes, absorbing and shedding sections over time.- History :...

, part of the War Office

War Office

The War Office was a department of the British Government, responsible for the administration of the British Army between the 17th century and 1964, when its functions were transferred to the Ministry of Defence...

. It was set up in 1942 to handle aerial photography

Aerial photography

Aerial photography is the taking of photographs of the ground from an elevated position. The term usually refers to images in which the camera is not supported by a ground-based structure. Cameras may be hand held or mounted, and photographs may be taken by a photographer, triggered remotely or...

. In 1943 this function was transferred to the air ministry and MI15 became responsible for the coordination of intelligence about enemy anti-aircraft facilities.