I don't know if this is of any help, but my Father was John William Webb born in Camberwell 1927-1984 died in Gosport and his parents were Alfred John Webb 1889-1955 and Bertha Hills May 1891-1933. I knew nothing about my Fathers family history, he never spoke of them, must have had a family fall out at some stage! After he died however, details started to come to light, he had been married before, there was a son involved, but the story I was told by a friend of my father was that it wasn't his child, but his brothers, who had an affair with my Father's wife while he was away serving in the army, this led to my fathers divorce. He married my mother Joan Rosina Hedley 1954. Now I can find no record of this brother but I am assuming that he was older than my father as Bertha died when my father was six. We lived in Gosport too, near to my mothers family Hedley. Maybe Arnold is this older brother? Does any of this tie up with your findings?