This marvellous film from Scotland shows Sir Steven Bilsland inspecting Civil Defence and Home Guard personnel. There are some great shots of uniforms and insignia. Of interest is that both style of helmet markings for senior ranks can be seen - both the early diamonds and later black stripes. There are also good shots of Fire Guards demonstrating how to put out fires.
War Weapons Week 1942 - Wartime Civil Defence inspection
News about interesting insignia, ARP related info and period photos that turn up.