United Kingdom - Passport & Nationality - British Citizenship by Double Descent (Burma Father)
Where a person was born in Burma before 01.01.1949 and either their father or Paternal grandfather (i.e. their father's father) was born outside of Burma, then this person could qualify for British Overseas Citizen (or BOC) status. Where an applicant has a grandparent born in the UK or the Right of Abode through another means, then this BOC status could be upgraded to full British Nationality.
A further requirement is that the applicant must not be a "potential citizen" of any Section 1(3) country. These are the 7 Independent Commonwealth countries that existed in the years before 01.01.1949 and include Australia, New Zealand, Canada, South Africa, Southern Rhodesia, Ceylon and Undivided India.