1891 census - John & Alice Smee living at 19, Stockwell Street, Camberwell.
George (age 17) and John (age 15) are recorded as "Smee". Both are errand boys.
This puts George in the Camberwell area, where he shows up in 1901-1921 census records.
As for the 1895 marriage record, George may have invented a father named John.