A lost Alfred Hitchcock film about the Nazi death camps is to be shown for the first time.
The Memory of the Camps, was made in 1945 using footage taken by British and Soviet film units, but was never aired.
Hitchcock was enlisted by his friend Sidney Bernstein as an advisor to help with the documentary.
It is thought the film, which has now been revamped by the British Imperial War Museum, took Hitchcock and his colleagues longer than expected to make. By the time it was ready
the authorities decided to shelve the documentary for diplomatic reasons.
The film by the British director is set for release in 2015 to mark the 70th anniversary of the liberation of Europe.
Warning : contains graphic images that may be unsuitable for younger audiences
