You could get the marriage certificate for the couple. That would give his age and father's name and occupation. Then try to find him in the 1901 census. I am assuming that he was over 17 when he married. The 1901 census would give you some information on his birth, family members, etc. The same would go for the bride.
June ¼ 1917 South Shields 10a 1315 Thomas A Leonard and Mary R Aitken
Janis