Media playback is unsupported on your device

Great Escape: Secret film documents WWII prison camp breakout

31 July 2013 Last updated at 09:26 BST

A remarkable film showing life inside an Austrian prisoner of war camp - and a daring escape from it - has been obtained by BBC News.

It was made by French prisoners during World War II, with a camera smuggled into the camp among sausages.

Christian Fraser looks at the risks taken by the officers in the production of the film, as well as the escape bid, and meets the last remaining survivor of the team.

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.