United Kingdom - Passport & Nationality - British Citizenship by Double Descent (Burma Independence)
Where a person was born in Burma before Independence on 04.01.1948 and either their father or Paternal grandfather (i.e. their father's father) was born in the UK Crown Dominions, a British Protectorate, a British Protected State, a UK Trust or Mandated Territory or a Foreign Country where ETJ was exercised, then 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.