Hi guys, I don't know if this thread is still alive or I need to start a new one but I think you are talking about my great gran dad who was "George Alfred Smith".
He was living with my great grandmother and had a daughter (my grand mother) in 1917. I have various bits of correspondence between them, George's father etc.
The most uncanny thing about this is I have a picture of him which is identical to the picture "crisas7" posted. (see attached) The correspondence I have is definitely "George Alfred Smith" and all the dates fit in with his army records from ancestry.co.uk. Maybe he changed his name to Grosvenor Ashford Smith?
I would love to chat to anyone related to him to clear up who he was. I can provide details of whats in the correspondence to confirm certain things about him.
Chris Lyon