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It is possible to apply for Naturalisation as a British Citizen if you have spent a qualifying period on Indefinite Leave to Remain in the UK (or Northern Ireland). If you are unsure about whether you qualify for Naturalisation in the UK, then read more about:

Alternatively, determine whether you qualify by completing our FREE Online Assessment.

Applying for Naturalisation as a British Citizen

An application for British Citizenship by Naturalisation must take place in the UK.

The application must:

  • Be completed on the correct application form;
  • Be addressed to the correct authority in the UK;
  • Be signed by the applicant as being correct;
  • Include the application fee (if applicable);
  • Be accompanied by evidence in support of the application

If any error is made with the application, then your application can be refused and you could lose your application fee.

The successful applicant must attend a Citizenship Ceremony in their local council area as a final act of acquiring citizenship.

To find out whether you qualify for Naturalisation as a British Citizen, take a couple of moments to complete our FREE Online Nationality Assessment:



Ask Philip Gamble whether you (or your children) have a claim to British nationality.

Learn more about these routes to British Nationality:

WhatPassport.com is a specialist UK Nationality and British Citizenship site offering an online search and assessment. Claims to hold a British Passport can be complex and the site offers a quick, simple search to give you the answers. While many people qualify for the UK Ancestry Visa based on holding a Commonwealth passport with a UK born grandmother or grandfather, we have found that if you have a grandparent born in the UK, or if your mother is British or your father is British, then there are several scenarios where you can claim British Nationality and the right to hold a British Passport. This stems from Britain’s collection of British Colonies, British Protectorates and British Protected States in the middle of last century and the Nationality rules concerning what are now the countries of the Commonwealth.

WhatPassport.com is a subsidiary of Sable International.

Sable International offers a range of services relating to UK and Australian immigration. For over 20 years, we have been helping people with their UK and Australian visa applications. We assist with applications for Ancestry visas, spouse visas, work visas, Tier 1 visas, UK working holiday visas, UK dependant visas, Tier 4 visas, UK Visitor visas, sponsorship visas or UK permanent residency or indefinite leave to remain. We also specialise in UK visa extensions. If you’ve overstayed your visa, our Overstayer Status Trace service can assist to regularise your visa status.