"Harry Charles Stuart Stagg (died 1933)". I can't find a record in the deaths indexes either. A quick sampling of the family trees provides no supporting source of their information.
Elaine,
See Sheffield Daily Telegraph Saturday March 3 1928
Annie Stagg of 9 Cundy St. was bound over for 12 months for wilfully abandoning her 6 children. Her husband had abandoned her 3 years before and all efforts to trace him had failed.
She and her children had from time to time been under the care of the Guardians, who were reluctant to relieve the children unless the mother also went into the workhouse.
There are many more details.
See also Sheffield Evening Telegraph 5th March 1920,
Annie Stagg of 12ct 1 H Young St was fined 5s for not sending her children to school.