United Kingdom - Passport & Nationality - British National Overseas (BNO) - Upgrade to British Citizenship
Holders of a British National Overseas Passport (known as a BNO) who have no other citizenship or nationality, can be registered as a British Citizen. The BNO was created in response to the transfer of sovereignty of Hong Kong in 1997.
A British National Overseas citizen should NOT assume that simply because they hold nationality of another country, that they cannot upgrade their BNO status to full British Citizenship - this is because their other nationality MAY have been granted incorrectly and could be voided or cancelled.
A person will not qualify under this section if they have done anything AFTER 19 March 2009 that resulted in the loss of another nationality.