Humphrey Jennings and Harry Watt's famous film, produced at the GPO film unit, is an enduring example of British self-mythology and rousing evidence of the artistic potential of supposed propaganda. A hymn to our capital city's resilience during the Blitz, structured as a day-in-the-life of stiff-upper-lipped Londoners, its poetic espousal of British fortitude ensured the film was widely exhibited internationally and utilised as a tool to help persuade America to join the Second World War.