Looking for Family of Humphrey Who Moved Out to Australia Around 1950 S 1960 S

Hi I'm looking for Kenneth Harbottle born 1929 who moved out to Australia with his wife and two children around the 1950's - 1960's whose childrens names are Stephen K Humphrey born around 1952 and Karen Humphrey 1954.

Kenneths mothers name was Enid Maud bnlack born around 1902 - died 1986 and his Father Royston A Humphrey born 1902 - 1976.