if you think that the 1911 census is the correct one, then Ernest Thomas was the son of Herbert James Hughes, labourer, and Mary Jane Breeze, born and baptised as Ernest Thomas Hughes Breeze as he was born before their marriage. His birth place is noted as Clun on census entries.
The Walford baptism is the one that goes with the Ernest Thomas Hughes registered Ross with mother's maiden name Lewis.
I meant have you found Ernest Thomas on the 1921 census to see what he gives as his place of birth?
The Herbert in London in 1911 gives his occupation as tailor's presser, not labourer as noted on Ernest's marriage entry.
The Herbert Hughes, labourer & father of Ernest Thomas the baker, was baptised in Bucknell, Shropshire 5 Aug 1866 son of Timothy, labourer, and Elizabeth Hughes.