Interesting document, David, and thanks for posting it. Any chance of further pages?
One of those you have posted already gives guidance about gas masks. Here is an image of the one I possess, originally belonging to a Walsall ARP warden. A fairly unattractive bit of kit.
Members of a certain age will no doubt recall the children's version of this. Mine was a coloured rubber, Mickey Mouse-like thing, designed, I suppose, to make it less objectionable to children. But having that thing stuffed into your face at the age of four is a memory which still lingers. I thought I was being suffocated. Thank goodness, it never had to be used in anger and it disappeared during the post-war years.
Chris