Check out the Census Records first to see what info they give as to place of birth. The only other way is to hire the Film of Christening/Baptism records from your local History Centre. In Kent it is in Maidstone, I have been there & they are very helpful. If you do not live near to Maidstone, you can hire the Film to view at your local Church of The Latter Day Saints (Mormons), they have access to all of the Films, however you may have to wait a while if someone else has already hired the Film. You can find out where your nearest Centre is via the Family Search website.
Hope this helps, good luck with your research, unfortunately your info does not match up with my Family Tree.