British Citizenship: Eligibility, Requirements and Application

British citizenship is the final step in most people's immigration journey to the United Kingdom. It provides the unconditional right to live in the UK with no immigration time limit, the right to hold a British passport and travel freely, the right to vote in all UK elections, diplomatic protection abroad, and the ability to pass citizenship to your children in most circumstances.

For most adult migrants, the path to British citizenship runs through Indefinite Leave to Remain (ILR) or EU Settled Status, followed by a naturalisation application. Children may be eligible to register as British citizens through a different, simpler process. The requirements differ depending on your route and circumstances.

If you are currently eligible to apply under the existing rules, acting without delay is advisable. The UK government has proposed an "earned settlement" framework that could extend the standard ILR qualifying period from five to ten years for most routes. These are proposals under consultation — not yet law — but applying now, if you qualify, is strongly recommended.

Good Character

Every naturalisation applicant must be of good character. The Home Office assessment now covers:

• Criminal record: including offences committed in the UK and overseas. Even spent convictions and minor fixed penalties may be relevant depending on timing and pattern.
• Immigration history: any periods of overstaying, working without permission, or other breaches of immigration law during the qualifying period may result in refusal. Full disclosure of your immigration history is essential.
• Financial conduct: tax compliance, outstanding NHS debts, and any bankruptcy linked to dishonesty are reviewed. The Home Office cross-references applications with HMRC records.
• Irregular entry: from 10 February 2025, individuals who entered the UK irregularly (such as by small boat or hidden in a vehicle) will normally be refused citizenship on good character grounds, regardless of how much time has passed.

Full and honest disclosure is essential. If you have any concerns about your good character record, Work Permit Cloud can advise on the likely impact before you submit an application.

Life in the UK Test

You must pass the Life in the UK Test before applying. The test has 24 multiple-choice questions on British history, traditions, law, and values, and requires a pass score of 75%. Results are valid for two years. If you previously passed the test for an ILR or Settled Status application and can provide your reference number, you do not need to sit it again.

Applicants aged 65 or over, and those with a long-term physical or mental condition, may be exempt.

English Language

Most applicants must demonstrate English at CEFR Level B1 or above, via an approved Secure English Language Test (SELT), a qualifying degree taught in English, or on the basis of nationality. The same age and disability exemptions apply.

Referees

Two referees are required. Both must have known you personally for at least three years and neither can be related to you, to each other, or live at the same address. They must have no recent criminal convictions and must not currently work for the Home Office or act as your immigration adviser.

• Referee 1: A British citizen who holds a British passport and is either a professional or aged over 25.
• Referee 2: A professional person of any nationality, such as a minister of religion, civil servant, doctor, solicitor, or accountant who is not representing you on this application.

The Application Process

Naturalisation applications are made using Form AN, submitted online through the GOV.UK portal. Once submitted, you book a biometrics appointment at a UKVCAS service point to provide fingerprints and a photograph. Processing typically takes around six months, though complex cases may take longer. Applications are not refunded if refused, so accurate preparation is critical.

On approval, you receive an invitation to a citizenship ceremony, which must be attended within three months. At the ceremony you take the Oath of Allegiance and receive your citizenship certificate. You should then return any Biometric Residence Permit you hold and can apply for a British passport.

Citizenship for Children

Children under 18 are not naturalised — they apply by registration under a different process. Different registration routes apply depending on whether the child was born in the UK, whether parents are British or settled, and the child's current immigration status. Registration applications for children also require referees, with at least one having engaged with the child professionally, such as a teacher or doctor.