OK, by rights they’re relatives, not direct ancestors.
I have discovered that my gt-gt-gt-uncle, John BALDOCK (b. 1850, Womenswold, Kent) arrived in Australia in 1873, married there in 1880 and started a family. Thanks to Coral for this confirmation.
I have yet to determine the reason why he went, and have yet to expand this new branch.
Watch this space!