'Nazi spy's detention changed WWII outcome'

Newly released British intelligence files reveal how a Nazi spy was snatched from a boat on the high seas before he could warn Germany that an Allied convoy was steaming ahead to invade North Africa.

It was a little-known episode that changed the course of World War II.

Gastao de Freitas Ferraz, the radio operator on a Portuguese cod-fishing vessel, was secretly feeding Germany information about the movements of Allied ships in the North Atlantic.