GOV.UK
Apply to register as a British overseas territories citizen and British citizen:
Form BIOT/Chagossian descendant
Use this form to register as a British overseas territories citizen and a British citizen if:
- you are a direct descendant of someone who held Citizenship of the United Kingdom and Colonies due to their birth in the British Indian Ocean Territory – you are the direct descendant of your parents, grandparents, great-grandparents, great-great-grandparents and so on (this does not include your aunts, uncles or cousins)
- you have never previously held the citizenship status(es) you are applying for.
You cannot apply online if you live in the Channel Islands, on the Isle of Man or in a British Overseas Territory. You should use the Channel Islands, Isle of Man, British Overseas Territory form.
Before you apply
Read the eligibility guidance before you start your application
You will be able to save your application and come back to it later if you need to.
If you are inactive for 25 minutes you will be automatically logged out.
There is no application fee.
How we use your data
The Home Office will use the personal information you provide to consider your application. We may also share your information with other public and private sector organisations in the UK and overseas. For more detail please see the Privacy Notice for the Border, Immigration and Citizenship system. This also sets out your rights under the Data Protection Act 2018 and explains how you can access your personal information and complain if you have concerns about how we are using it.