You may be eligible to apply for British Nationality & Citizenship by ancestry if you were:

  • born, adopted or naturalised in the UK or a British territory,
  • a child of a British national or citizen or person described above,
  • a person with British or Irish ancestry,
  • a person with a family link to a former British colony or protectorate,
  • a woman who married a UK citizen before 1983, or,
  • a person resident in the UK or British overseas territory, or serving its government or military services (see naturalisation).

Recent changes to the law have created many more opportunities for people to acquire British nationality and citizenship by descent through a father or mother, including adoption and children of unmarried parents. There are hundreds of ways to potentially qualify through a parent or grandparent who held British Nationality or a colonial connection. Each situation has to be assessed individually.

We can assess your eligibility for UK citizenship and nationality through ancestry and your route to obtaining British nationality & a British passport. Thanks to your British ancestry, you may have British nationality and not even know it - due to the complexity of the independence arrangements for different countries you may already be British and not be aware of it.

We can assess your eligibility for UK citizenship...

Examples of British nationals born outside the UK

Below is a list of situations that we commonly encounter and which in many cases lead to the person successfully proving or obtaining British citizenship through ancestry.

Descendent of someone born in the UK or an existing British overseas territory:

A person with a parent or grandfather born or adopted in the UK or an existing British Overseas Territory. Many such people live in Canada, The United States, Australia, New Zealand and South Africa.

Flags of many nations

Descendent of someone born or resident in a former UK territory:

A person or their father or paternal grandfather who was born or resident in a former colony, protectorate, mandated or trust territory of the UK in the Caribbean, Middle East, West Africa, East Africa, Southern Africa and South Asia.

How Passportia Works

Our preliminary service entails completing a comprehensive evaluation and report. Here, we ask you to provide the necessary details of your ancestry for us to determine your eligibility within 21 working days.

In the event of the evaluation yielding a positive outcome, we will email the comprehensive report plus a proposal on how to go forward with the application for your British Citizenship application and apply for a British passport.

Our services are of an excellent standard and we have a very high satisfaction rating from past customers (see our Google reviews). Our work is done to a fixed price quotation. 

Don't hesitate, start your assessment by completing the form below!


  • A citizenship law specialist
  • Successful with complex claims
  • Supporting multiple countries
  • Fast, flexible and precise

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