The simple five-word message is the very model of British restraint and stiff upper lip. Keep calm and carry on.
In 1939, with war against Germany looming, the Government designed three posters to steady the public's resolve and maintain morale. These featured the crown of King George VI set against a bold red background, and three distinctive slogans - "Freedom is in Peril", "Your Courage, Your Cheerfulness, Your Resolution Will Bring Us Victory", and "Keep Calm and Carry On".
Two-and-a-half million copies of "Keep Calm" were printed, to be distributed in the event of a national catastrophe, but remained in storage throughout the war.