Night Mail is one of the best known British documentaries of the 1930s and is often considered to be one of the best documentaries and best short films ever made. In a brisk 24 minutes, the film documents the overnight journey of the travelling post office train from London to Scotland. The film follows the train from the moment the letters are loaded into mail bags at Euston Station until its arrival in Scotland. The film was made with the co-operation of the LMS (London, Midland & Scottish) Railway and there are no actors, just ordinary people doing their everyday jobs.