Interestingly the chap who I refer to in post 3 and 9 did retain a souvenir of his WW1 service in the form of a bayonet which my mother and an uncle of mine remembers seeing as children in the 1940s. Sadly this bayonet doesn't seem to have survived in the family but by questioning my mother and uncle it sounds like it was probably a German bayonet. My mother never remembers it having a handle which may suggest it was just the blade, broken off from the rest of the bayonet. Whether or not it was the bayonet which injured him badly I don't know? Would British Army doctors/medics of the WW1 period have given the bayonet, if available, to the soldier who had been badly injured by it to keep as some sort of "souvenir"?