Thanks Ken, My GF was based on the tops of buildings in WW2, the family lived in Sydenham London at the time, my dad remembers him going out to do his bit, his day job was bookbinder. His brother in law was in the Fire brigade and we've assumed that Fred got involved because of that link. During WW1 my dad thought he did the same thing, my GM said he was in the Navy, sadly she isn't around anymore to quiz.