Tweet 1. ARP Warden exercises in London simuluating the effects of high explosive and incendiary bomb incidents. These Civil Defense workers also practice casualty evacuation techniques from burning buildings.  2. Footage from War Weapons Week parade in 1941: soldiers and Civil Defence workers march across London. 3. Colour footage of Prime Minster Winston Churchill reviewing troops, emergency ser More..vice and Civil Defence workers in Hyde Park, London in July 1941