This interesting photograph - from an air raid incident in London - shows some interesting helmet markings and personnel. As a stretcher is brought out of the ruins of a bombed building, a Post Warden (far right with star above three chevrons) surveys the seen. Next to him a white helmet officer from the Light Rescue squad (possibly a surveyor) exits the scene. To the left an ARP women in a gabardine coat and another lady (from another service) talk to a senior officer (white helmet with double stripes - the helmet markings are not clear alas). The photo appears to be from the same incident that colour photographs were taken.
News about interesting insignia, ARP related info and period photos that turn up.