British Citizenship by Descent

Eligibility Quiz

Was at least one of your parents a British citizen at the time of your birth?

You must provide original documents or certified translations for any papers not in English or Welsh.

Identity Documents

Parental Evidence

Your parent’s UK birth certificate, British passport (valid at the time of your birth), or their naturalization/registration certificate.
Your parents’ marriage certificate (essential for births before July 2006 to a British father).

Supporting Evidence (Route Specific)

Section 4L/Double Descent: Evidence of a grandparent’s UK birth or evidence that a parent was in "Crown Service" (military or diplomatic service) at the time of your birth.
Historical Claims: Evidence of your parent's status as a "Citizen of the UK and Colonies" (CUKC) if born before 1983.

Was at least one of your parents a British citizen at the time of your birth?

You must provide original documents or certified translations for any papers not in English or Welsh.

Identity Documents

Parental Evidence

Your parent’s UK birth certificate, British passport (valid at the time of your birth), or their naturalization/registration certificate.
Your parents’ marriage certificate (essential for births before July 2006 to a British father).

Supporting Evidence (Route Specific)

Section 4L/Double Descent: Evidence of a grandparent’s UK birth or evidence that a parent was in "Crown Service" (military or diplomatic service) at the time of your birth.
Historical Claims: Evidence of your parent's status as a "Citizen of the UK and Colonies" (CUKC) if born before 1983.