How and why Winston Churchill ordered the Royal Navy to attack the French fleet in July 1940.

Churchill's Darkest Decision

The background to, events of and consequences of the Battle of Mers-El-Kebir on 3 July 1940. In that battle, Royal Navy ships fired on the French Fleet in order to prevent it from falling into German hands. A French battleship was sunk and several other ships damaged. Nearly 1,300 French sailors were killed.

Directed by Richard Bond