Night Mail (1936) is one of the best-loved and best-known films in the canon of British documentary cinema. Bringing together the creative talents of Harry Watt, Basil Wright, WH Auden and Benjamin Britten, the film gave John Griersona's documentary school its first popular success. Its collectivist politics and its peculiarly modest brand of modernism is as redolent of the inter-war age as Agatha Christie, Penguin Books or The Shell Guides...