This Station Will Now Remain Open During Air Raid Alerts; Artist Unknown, November 1940. The Underground Group, and later London Transport, produced a wide variety of public information posters during the First and Second World Wars. During the Second World War, posters served both to relay essential information and to lift commuters' spirits.
Unpatriotic A WWI poster from the British National War Savings Committee urges restraint in the use of materials during war time. It's better to spend on war bonds: "To dress extravagantly in war time is worse than bad form, it is unpatriotic." Printed by Roberts & Leete, Ltd., London, 1915.