Night Mail (1936) was one of the most critically acclaimed films to be produced within the British documentary film movement. It was also among the most commercially successful, and remains the film most commonly identified with the movement. By 1936, film output at the GPO Film Unit was divided between the production of relatively routine films promoting Post Office services, and more ambitious ones experimenting with the use of sound, visual style, narrative and editing technique. Night Mail is firmly in the latter category.
Ian Aitken, Screenonline
Harry Watt (18 October 1906 – 2 April 1987) was a Scottish documentary and feature film director, who began his career working for John Grierson and Robert Flaherty. His 1959 film The Siege of Pinchgut was entered into the 9th Berlin International Film Festival. He was born in Edinburgh, and died in Amersham, Buckinghamshire.
His film Target for Tonight won an honorary Academy Award in 1942. —Wikipedia