Finding a Blackburn in Yorkshire is no easy thing - plenty in my tree but not this one!
This certainly seems to fit with the correct quarter for George Raymond's reported birth in correct district for Aldershot. Ethel Nellie Rowley's birth about 3 years earlier than that of Ethel Nellie Schofield but that is taken from reported age at death - so only as good as the informant knew.
So George R could have been born a Blackburn, then his mother and father separated, mother went to live with James P Schofield as his wife but could not marry because her husband would not divorce her.
This would account for no birth cert in Schofield name for George R and no marriage between Ethel and James P.
There are two deaths for Frederick G Blackburns whose age at death would match with his stated age in 1911.
Q2 1928 age 51 Leeds vol 9b page 355
and
Q1 1955 age 80 Bradford vol 2b 254.
If the former, the impediment to marriage would be removed in 1928. The latter one just outlived James P by a year, so would fit the theory.
In 1911 Ethel and Frederick Blackburn have two children, the boy dies a few months after census date - he could have thrown a spanner in the theory given his name, can't see what happens to the girl.
The other thing, who was Peter John Schofield (informant on George R's death cert), I don't see that he had a son or a brother, but may have adopted, in that case likely to still be living.
