Thank you all for your replies. John Matthews's birth was registered in the Neath district in 1917. He was the son of James Matthews and Hannah Matthews (nee Evans). John had a few siblings, one being Catherine, born in 1921.
As I mentioned in my first post, John went to live in South Africa and, I believe, married a girl from that country. I don't have the name of John's wife, but they had three children. Their names being Charmaine, Cheryl and Gwynfryn.