Comments: It seems likely that the William R. Crofton is the same William Crofton that appears in the 1901 census living with his parents in Portsmouth, aged 13.
Tracing this back, there is an entry in the GRO indices for Jul/Aug/Sep 1887 of the birth of a William Royston Crofton, born in Portsea (volume 2b page 461).
Spouse: Blanche M. J. Hawkins (Married 1914)
Children: Vernon Royston Crofton, Brenda Crofton
In the newspaper cutting about Vernon's obituary, one of his daughters is named "Mrs. Crofton". This seems to tie in very well with the entry in the GRO index for Jul/Aug/Sep 1914. Here it is noted that a Blanche M. J. Hawkins was married to a Mr. Crofton in Chelsea, (volume 1a page 996).
On the relevant page for Crofton, there is an entry for a William R. having married a miss Hawkins.