Thanks Peter. Daniel Mackenna, my great grandfather, served in WWI. I think he was in the army, as he was gassed at Gallipoli. He died in the thirties.
My grandfather, William Hall (and his son, also William) served in the Royal Navy in WWII. My grandfather was a CPO. I do not know what branch he was in, but I am asking family members for more information. It is a bit tricky, because I live in Cologne and the surviving family is strewn around the UK. Some of them are getting on a bit and their memories are not entirely reliable. I am a youngster of fifty-one.
Good of you to reply. I will get in touch.