Documentary, public information film, morale booster; propaganda film – all descriptions that apply to Humphrey Jennings and Stewart McAllister's extraordinary war-time film. Using his customary combination of poetry and propaganda, Jennings constructs a collage of the various people and classes of Britain, at home and at work, at war and at peace. The result, while not overtly proselytising, sounded a clear clarion call to internal and international audiences to fight and save Great Britain from the onslaught of war.