Keep Calm and Carry On was a motivational poster produced by the Government of the United Kingdom in 1939 in preparation for World War II. The poster was intended to raise the morale of the British public, threatened with widely predicted mass air attacks on major cities. Although 2.45 million copies were printed, and the Blitz did in fact take place, the poster was only rarely publicly displayed and was little known until a copy was rediscovered in 2000 at Barter Books, a bookshop in Alnwick. It has since been re-issued by a number of private companies, and has been used as the decorative theme for a range of products.

The Ministry of Information (MOI), headed by the Minister of Information, was a United Kingdom government department created briefly at the end of the First World War and again during the Second World War. Located in Senate House at the University of London during the 1940s, it was the central government department responsible for publicity and propaganda. The MOI was dissolved in March 1946, with its residual functions passing to the Central Office of Information (COI); which was itself dissolved in December 2011 due to the reforming of the organisation of government communications.