Hi! I'm sorry it took me so long to respond, I lost track of things, stopped using the original e-mail I signed up with, and forgot I'd posted this.
Alexander (Sandy) was my grandfather. He married Rose Bryant in the 1940s, had two children, Virginia and my father Martyn, and was living very happily with Rosie in Kent until he sadly passed away last month.
Isabel emigrated to South Africa, Johannesburg I believe. I know very little about her, but I think she married and had children and passed some years ago.
It's good to have some more names for my family tree and a new distant cousin!