The significance of Northern Ireland's role in World War II was highlighted by Winston Churchill who, in a 1943 letter to J.M. Andrews - the recently resigned Prime Minister of Northern Ireland - stated, '(but) for the loyalty of Northern Ireland... we should have been confronted with slavery and death, and the light which now shines so strongly throughout the world would have been quenched'. Although the film places great emphasis upon the efforts of the factory workers, particularly female workers, we do not get to hear their voices. Instead the narrator - a middle-class, English voice-over - speaks on their behalf. The film also provides strong support for the Unionist position in Northern Ireland.