Hi Maz,
You can never take anything as gospel that you find on any certificate or census, many ages, places of birth or fathers names and occupations have been known to be incorrect.
A well know error was for illegitimate people to falsify a fathers name and occupation on marriages so not to appear so. I am not saying this is the case with yours but that you need to be aware of it.
I can find these births
James Trainer Dec q. 1892 Chester Le Street, Durham 10 -524
John James Trainer Sept. q 1892 Morpeth, Northumberland 10b- 578
James Trainer Dec q. 1891 Newcastle upon Tyne, Northumberland Tyne and Wear 10b - 104.
Also for the other reasons Groom has stated.