WILL A CHILD WHO IS BORN IN THE UNITED KINGDOM ON OR AFTER 1 JANUARY 1983 BE A BRITISH CITIZEN? (SEE CHART A)
A child will be a British citizen when he or she is born if one of his or her parents (see Note 4) is:
•a British citizen (it does not matter how the parent concerned became a British citizen), or
•settled in the United Kingdom (see Note 5)
If neither of the child’s parents is a British citizen or settled in the United Kingdom, then the child will not be a British citizen when he or she is born.
http://www.ukba.homeoffice.gov.uk/si...df?view=Binary
