The Ministry of Information's publicity team created a propaganda campaign to boost public morale. The Home Secretary approved these posters in August 1939. Two posters were immediately released, but one was kept for later to uplift the public during challenging times. This poster became the most famous wartime slogan, representing the Blitz spirit of staying calm and carrying on. The government hoped it would resonate with the public.

Once war was declared, the nation prepared for the expected bombings. Advice and updates were shared through radio and newspapers. Within days, one million children were moved to safer locations, numerous protective measures were put in place, and hospitals were made ready for mass casualties. Large quantities of paper coffins were produced, anticipating many deaths. "If you are provided with a steel shelter and have not erected it, do so at once."

The government prioritized providing people with shelters, distributing tin Anderson shelters, converting basements, and building brick shelters. However, they decided not to use underground stations as shelters to maintain smooth transport. "When you hear these warning sirens, take cover at once. Put on your gas mask."

In the weeks following the war declaration, there were many false alarms, leading to widespread fear of imminent bombings. Could people keep calm and carry on? Nina's diary gives us a glimpse of the mounting panic, as she observed frantic buying in her parents' shop. People were going from shop to shop, buying essentials like candles, sugar, and black paper wherever they could find them, and as cheaply as possible.