If I might kindly say that this could be a delicate situation. Might there be a possibility that he had two families; or, perhaps he remained in England for a number of years (with just one family)?
I know of two instances where the servicemen each had a family in Ontario only to later have families in England as well (with neither family knowing about the other).
As you may know, Canada has strict privacy laws. Unfortunately, it may be difficult to find “recent” documents. Is your family fairly certain that he was born in Toronto, or, did he possibly live there just prior to the war?