Guidance
Form B(OS): guidance
Guidance to register as a British citizen if you have certain other types of British nationality.
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Details
Read the B(OS) guidance to find out if you can register as a British citizen if you are a British Overseas citizen, British subject, British protected person, or British National (Overseas) and have no other citizenship or nationality.
Updates to this page
Published 22 March 2019
Last updated 24 July 2024
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Added a section on application processing times, and added more details to the section on travelling to and from the UK after registering.
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Document format and style updated. Outdated information removed or updated accordingly. References and links to fees updated.
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Accessible HTML version added.
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First published.