Interesting air raid incident photograph - three white helmets

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.

An air raid incident with three white-helmet Civil Defence servicemen and rescue squad.