Specialist legal advice on British citizenship by naturalisation, including applications after ILR or settled status, British citizen spouse applications, residence and absences, good character, English language, Life in the UK and complex nationality cases.
For many people who have made the United Kingdom their permanent home, naturalisation as a British citizen is the final stage of their immigration journey.
Naturalisation is the legal process through which an eligible adult can apply to become a British citizen under the British Nationality Act 1981.
It commonly follows the grant of Indefinite Leave to Remain (ILR) or settled status under the EU Settlement Scheme. However, obtaining permanent immigration status does not automatically mean that an application for British citizenship will succeed.
Naturalisation has its own legal requirements.
The Home Office will consider your residence in the UK, absences, immigration history, English-language ability, Knowledge of Life in the UK, good character and whether you were physically present in the UK on the required date at the beginning of the qualifying period.
Different requirements apply if you are married to or in a civil partnership with a British citizen.
At Knights & Shah Solicitors, we advise individuals on British naturalisation applications, including straightforward applications following settlement and more complex cases involving excessive absences, previous immigration breaches, criminal matters, good-character concerns or circumstances requiring Home Office discretion.
Naturalisation is one of the principal routes through which an adult who is not already British can become a British citizen.
It is different from holding a visa, ILR or settled status.
Naturalisation is also distinct from registration as a British citizen, which applies to particular categories of adults and children under separate provisions of British nationality law.
Before applying, it is therefore important to establish whether naturalisation is actually the correct nationality route.
The Home Office’s Form AN guidance was updated in July 2026 and remains the principal current applicant guidance for naturalisation. It makes clear that naturalisation is not an entitlement. An applicant must satisfy the statutory requirements and, where relevant, persuade the Home Office to exercise discretion favourably.
There are two principal naturalisation routes relevant to most adults living in the UK.
An applicant who is not relying upon marriage to a British citizen will generally need to:
Different requirements apply where the applicant is married to or in a civil partnership with a British citizen.
These applicants generally rely upon a 3-year residence period rather than five years and do not ordinarily need to wait 12 months after obtaining ILR or settled status before applying.
Current Home Office Form AN Guidance
For many applicants, the pathway is:
Qualifying residence in the UK
↓
Indefinite Leave to Remain
↓
Hold ILR for 12 months
↓
Apply for naturalisation
Under the standard route, an applicant will normally need to have lived in the UK for at least five years and have been free from immigration time restrictions for at least the final 12 months.
For example, someone obtaining ILR following a qualifying Skilled Worker route will commonly wait a further 12 months before naturalising.
The grant of ILR does not, however, guarantee citizenship.
Residence, absences, good character and the other nationality requirements must still be assessed independently.
A person holding settled status under the EU Settlement Scheme can also potentially apply for naturalisation.
Under the standard route, an applicant will normally need to have held settled status for at least 12 months before applying.
Different timing applies to an applicant married to or in a civil partnership with a British citizen.
Applicants with historic EEA residence or more complicated immigration histories should ensure that their status and qualifying period are properly assessed before applying.
Applicants married to or in a civil partnership with a British citizen benefit from different residence provisions.
An applicant will generally need to:
One particularly important difference is the timing following settlement.
An eligible spouse or civil partner of a British citizen does not ordinarily need to wait 12 months after obtaining ILR or settled status.
They may potentially apply for naturalisation once permanent status has been obtained, provided all the remaining requirements are satisfied.
Residence is one of the most important parts of naturalisation.
For the standard route, the Home Office normally considers the 5 years immediately preceding the application.
For an applicant married to a British citizen, the relevant period is generally 3 years.
The Home Office considers more than simply whether you have lived somewhere in Britain for that length of time.
It will consider:
Your naturalisation residence calculation should therefore be checked independently from the calculation previously undertaken for ILR.
One of the most easily overlooked naturalisation rules concerns your location on a specific date.
For standard naturalisation, you should generally have been physically present in the UK exactly 5 years before the date the Home Office receives the application.
For applicants married to British citizens, the corresponding period is 3 years.
This can catch otherwise eligible applicants by surprise.
Someone may have lived in the UK for ten or twenty years but have been overseas on holiday on the exact date five years before their proposed application.
The current Form AN guidance expressly addresses this first-day requirement. The intended application date should therefore be checked against the applicant’s travel history before submission.
For standard five-year naturalisation, an applicant should generally not have spent more than:
450 days outside the UK during the 5-year qualifying period, and
90 days outside the UK during the final 12 months.
For an applicant married to a British citizen, the normal limits are:
270 days during the 3-year qualifying period, and
90 days during the final 12 months.
Applicants who travel extensively for employment, business or family reasons should prepare a complete travel history before applying.
Exceeding the normal absence limits does not necessarily mean naturalisation is impossible.
The Home Office has discretion in certain circumstances.
Relevant considerations can include:
Where discretion is required, it should not be left for the caseworker to identify without assistance.
A properly prepared application should explain the excess, identify the circumstances supporting discretion and provide appropriate evidence demonstrating the applicant’s connection to the UK.
There have been substantial changes to English-language requirements across the UK immigration system, but it is important not to confuse visa and settlement changes with naturalisation requirements.
From 8 January 2026, the English requirement increased from B1 to B2 for certain economic immigration applications, including new applicants under the Skilled Worker, High Potential Individual and Scale-up routes.
The Statement of Changes published on 5 March 2026 also introduces a B2 English requirement at settlement for a range of immigration routes, but that change is scheduled to take effect on 26 March 2027.
As at August 2026, the English-language standard for naturalisation remains B1 speaking and listening or above, unless the requirement is met through another accepted method or an exemption applies.
Depending upon the circumstances, an applicant may be able to rely upon:
Applicants should therefore not automatically take a B2 test simply because of the January 2026 immigration changes.
Most naturalisation applicants must also satisfy the Knowledge of Life in the UK requirement.
This normally means passing the Life in the UK Test.
If you already passed the test when obtaining ILR, you will not ordinarily need to take it again for naturalisation.
The Life in the UK Test fee remains £50 as at August 2026.
Exemptions can apply in certain circumstances, including on grounds of age or a qualifying long-term physical or mental condition.
The good-character requirement is one of the most important aspects of naturalisation.
The Home Office considers considerably more than whether an applicant has a criminal conviction.
Potentially relevant matters include:
The Home Office good-character guidance was updated again on 30 April 2026, so historic assumptions about how previous immigration breaches are treated should not be relied upon.
This is particularly important under the current nationality policy.
For citizenship applications made from 10 February 2025, the Home Office guidance states that a person who previously entered the UK illegally will normally be refused citizenship regardless of how much time has passed since the illegal entry.
The guidance also addresses applicants who arrived without required entry clearance or an ETA after making a dangerous journey, including travel by small boat or concealed in a vehicle.
This is not expressed as an absolute rule in every case.
The Home Office guidance recognises circumstances in which the manner of arrival may have been outside the applicant’s control—for example, where the person was a child, was trafficked or was a victim of modern slavery at the relevant time.
Anyone with a history of illegal entry should therefore obtain specialist advice before submitting a naturalisation application.
Not every historic immigration breach is treated in exactly the same way as illegal entry.
Current good-character guidance allows certain lawful-residence breaches to be disregarded where the applicant subsequently obtained settlement and specified conditions are satisfied.
However, the Home Office can still consider matters including:
Applicants should therefore avoid assuming either that all historic immigration problems are fatal or that obtaining ILR automatically wipes the history clean.
The precise breach needs to be identified and assessed against current nationality policy.
Criminality can also affect whether the Home Office is satisfied that an applicant is of good character.
Relevant matters can include:
A conviction does not necessarily mean that a person can never naturalise.
However, the application should be assessed against the current good-character guidance before submission.
Most importantly, applicants must provide complete and accurate information.
Failure to disclose a relevant conviction, immigration breach or other material matter can itself create a serious good-character concern.
Applicants naturalising under the standard five-year route must ordinarily satisfy the future-intention requirement.
The Home Office will consider whether the applicant intends to continue living in the UK or falls within another qualifying category of service contemplated by the legislation.
This does not mean a British citizen can never subsequently live overseas.
The issue concerns the applicant’s genuine intention at the time naturalisation is considered.
Applicants whose principal home, family or employment is predominantly overseas may therefore require a closer assessment.
A naturalisation application normally requires two referees meeting Home Office requirements.
There are rules concerning matters such as:
Referees should be checked before submission rather than selected simply because they are readily available.
The precise evidence depends upon the individual application but may include:
Where excessive absences, illegal entry, previous immigration breaches or criminal matters arise, additional evidence and legal representations may be appropriate.
A premium application should be focused on proving the relevant nationality requirements, rather than simply uploading unnecessary volumes of documents.
A properly prepared application should normally involve:
Determine whether the applicant falls under the standard five-year provisions or the British-spouse three-year provisions.
Confirm permanent status and whether the 12-month requirement applies.
Review the full qualifying period and the final 12 months.
Confirm the applicant’s physical presence in the UK exactly five or three years before the intended application.
Identify criminal, immigration, financial or other relevant matters.
Ensure the current requirements have been satisfied or an exemption applies.
Prepare the documentary evidence and ensure the proposed referees qualify.
Most applicants living in the UK apply online and complete the required identity and biometric process.
From 8 April 2026, the Home Office naturalisation fee increased to £1,709. The published fee table identifies the citizenship ceremony fee separately where applicable.
The standard Home Office service level remains approximately six months.
There has also been an important 2026 procedural development.
From 20 July 2026, customers applying for citizenship from within the UK can use the new citizenship priority service, subject to the applicable eligibility and service requirements. The Form AN material was updated in July 2026 to reflect this.
Applicants requiring a faster decision should check the current availability and conditions before applying.
Naturalisation applications frequently become complicated because an applicant:
Many of these issues can be identified before the application fee is paid.
At Knights & Shah Solicitors, we advise applicants on British citizenship by naturalisation, including straightforward applications following settlement and complex nationality cases.
We can assist with:
Our focus is to identify potential problems before submission and present the application clearly against the current requirements of British nationality law and Home Office policy.
If you require advice contact Knights & Shah Solicitors.
We provide clear, solicitor led advice, strategic case planning and robust court representation to protect our clients.
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