What happened to Stanley George Stoneman?

STANLEY GEORGE STONEMAN was born on 22 June 1890 in Islington, London, United Kingdom to John William Stoneman and Eva A Vevsey. Stanley was a Carpenter (journeyman). He was recorded in the census in 1901, aged about 11, in Hammersmith, London, United Kingdom. 3 siblings were mentioned in the same census: Arthur (1896), Ethel (1897) and Harold (1900).

ELIZABETH ANN JENKINS was born on 7 November 1887 in Godrengraig, Pontardawe, Breconshire, Glamorgan, Wales, to Daniel Jenkins and Hannah Williams. Elizabeth Ann died on 21 December 1949, aged 62, in Godrergraig, Wales, still official married to Stanley George according to her certificate of death.

Stanley George Stoneman, aged 20, married Elizabeth Ann Jenkins, aged 23, on 15 April 1911 in Pontardawe, Glamorgan, Brecknock, Wales. They had eight children:
Clarice Elizabeth Stoneman in 1912. Died in ?
Daniel John Stoneman in 1913. Died in 1984.
Arthur Robert (Bob) Stoneman in 1915. Died in 1984.
Lewis Samuel Stoneman in 1917. Died in 2002.
Hannah Beryl Stoneman in 1919. Died in 1999.
(Living daughter) Stoneman in 1921.
Ronald Stoneman in 1924. Died as an infant.
Stanley Stoneman in 1926. Died as an infant.

Stanley George left his family somewhere between 1930 and 1940 and moved to London, United Kingdom. Some in his family visited him hoping that he would return to Wales, but he decided not to. He might have changed his name and remarried. But what really happened to him we don't know. Would be greatfull of any information regarding Stanley George.