Form

Register as a British citizen (form B(OS))

Register as a British citizen if you are a British Overseas citizen, British subject, British protected person, or British National (Overseas).

• From: UK Visas and Immigration
• Published: 12 April 2019
• Last updated: 31 October 2024 — See all updates

Documents

Register as a British citizen (form B(OS))

PDF, 499 KB, 15 pages

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Details

You can apply online unless you live in the Channel Islands or the Isle of Man.

You can get help to make your online application if you are in the UK and you do not have the appropriate access, skills or confidence to complete an online immigration application form.

Use this form if you live in the Channel Islands or the Isle of Man and are a British Overseas citizen, British subject, British protected person, or British National (Overseas) and have no other citizenship or nationality.

You can also use this paper form if you live elsewhere and want to apply by post. You will need to submit your documents with your application.

Most people who live in the UK and apply online are able to keep their documents while their application is processed.

You should read:

• the B(OS) eligibility guidance to check if you can apply
• the nationality forms guide to help you fill in the form

Send the form and payment slip (including the fee) with your documents to:

• the Lieutenant Governor if you are in the Channel Islands or Isle of Man
• UK Visas and Immigration at the following postal address if you live elsewhere:

Department 1
UK Visas and Immigration
The Capital Building
New Hall Place
Liverpool
L3 9PP

We are aware this publication may have accessibility issues. We are reviewing it so that we can fix these. Read more about our accessible documents policy

Published 12 April 2019

Last updated 31 October 2024 + show all updates

1. 31 October 2024

   Updated in line with changes to the biometric residence permit (BRP).

2. 23 May 2024

   Referee and identity section updated at question 3.1.

3. 16 April 2020

   Applying by post is taking much longer than applying online because of coronavirus (COVID-19). It is taking longer than usual to process applications because of coronavirus. This will not affect the decision.

4. 12 April 2019

   First published.