Only known wartime film of Bletchley Park activities discovered

The only known wartime film footage of a secret site connected to Bletchley Park has been donated to Bletchley Park Trust.

World War Two veteran Geoffrey Pidgeon, who worked for MI6 Section VIII, on seeing his father Horace in the film who also worked at Bletchely Park.

Dr David Kenyon, Research Historian at Bletchley Park also speaks.