George Herbert Walker was a bastard. (see reply number 4 of THIS thread)
We know nothing of his father, and nothing of his mother.
NOR do we have any inkling of where he was born.
Nor do we know any address for him after the 1909 marriage, to try for 1911 / 1939.
YOU would have to supply addresses and actual dates of birth (& you have chosen not to buy any certificates)
Ada Walker (married in 1909) nee Byfield, daughter of Charles Byfield, a Carriage fitter.
Ada Byfield's birth reg (mother's maiden name is shown as Ladds)
Oct-Nov-Dec 1886 Aston, Warwickshire, England
Volume 6D Page 260
Parents Marriage (boxing day 1881) https://familysearch.org/ark:/61903/1:1:NF88-2P71891 census:
https://familysearch.org/ark:/61903/1:1:WL93-33Z1901 census: Not found at this time.
Charles (Ada's father) in 1911
https://www.familysearch.org/ark:/61903/1:1:XWZ4-RKP