Specialist legal advice on British citizenship applications, including naturalisation after ILR or settled status, applications by spouses of British citizens, residence and absence requirements, good character, children’s registration and complex British nationality matters.
Becoming a British citizen is often the final stage of a long immigration journey in the United Kingdom.
For many applicants, citizenship follows several years of lawful residence and the grant of Indefinite Leave to Remain (ILR) or settled status. However, obtaining permanent immigration status does not automatically make someone eligible for British citizenship.
Naturalisation is a separate legal process under British nationality law.
The Home Office will consider matters including:
Different rules apply where an applicant is married to or in a civil partnership with a British citizen. Children may also have separate rights to British citizenship by registration, and some children are already British automatically without needing to apply.
At Knights & Shah Solicitors, we advise individuals and families on British citizenship, naturalisation and registration applications, including cases involving excessive absences, complex immigration histories and good-character concerns.
British citizenship is a nationality status and should be distinguished from immigration permission such as a visa, ILR or settled status.
A British citizen can generally:
There are several ways a person can become British. Some people acquire citizenship automatically at birth, while others must apply through naturalisation or registration.
The correct route depends upon the applicant’s age, place and date of birth, parents’ nationality and immigration status, residence history and current circumstances.
Naturalisation is the principal citizenship route for many adults who have settled permanently in the UK.
An applicant relying upon the standard naturalisation route will generally need to:
Naturalisation is not simply an administrative step following ILR. The Home Office conducts a fresh assessment under nationality law.
For most applicants who are not married to a British citizen, the usual pathway is:
Qualifying UK residence
↓
Indefinite Leave to Remain
↓
Hold ILR for at least 12 months
↓
Apply for British citizenship
An applicant must normally have lived in the UK for at least five years before applying and have held ILR for at least the final 12 months.
The grant of ILR does not guarantee citizenship.
The applicant must still independently satisfy the nationality requirements concerning residence, absences, physical presence, language, Life in the UK and good character.
Applicants holding settled status under the EU Settlement Scheme can also potentially naturalise as British citizens.
For most applicants who are not married to a British citizen, settled status will normally need to have been held for at least 12 months before applying for naturalisation.
There can be additional issues for applicants with historic EEA residence or pre-settled status, so the individual’s nationality and immigration history should be reviewed before applying.
Different naturalisation requirements apply where the applicant is married to or in a civil partnership with a British citizen.
The applicant will generally need to:
There is one particularly important advantage.
An eligible person married to a British citizen can generally apply for naturalisation as soon as ILR or settled status has been obtained, provided all the other requirements are satisfied.
This can make the timing of a citizenship application considerably different from the standard naturalisation route.
Applicants using the standard naturalisation route will generally need to demonstrate at least five years’ residence in the UK immediately before the application.
Residence for nationality purposes should be considered separately from the qualifying residence previously used to obtain ILR.
The Home Office will examine:
Applicants should therefore avoid assuming that because the Home Office granted ILR, the residence requirements for citizenship must automatically be satisfied.
Applicants married to or in a civil partnership with a British citizen normally rely upon a three-year residence period rather than five years.
They should generally have spent no more than:
Again, these requirements should be calculated using the proposed citizenship application date.
One of the most commonly overlooked British citizenship requirements concerns the applicant’s location on a specific date.
For the standard five-year naturalisation route, the applicant should generally have been physically present in the UK exactly five years before the date the Home Office receives the application.
For a spouse or civil partner of a British citizen, the equivalent requirement is physical presence exactly three years before the application date.
This can catch applicants by surprise.
For example, someone may have lived in Britain for 15 years but have been abroad on holiday on the exact date five years before their proposed application.
The intended submission date should therefore be checked against the applicant’s travel history before the application is filed.
For a standard five-year naturalisation application, an applicant should generally not have spent more than:
For applicants married to British citizens, the general limits are:
A detailed travel history should therefore be prepared before applying.
This is particularly important for applicants who travel extensively for employment, business or family reasons.
Exceeding the normal absence limits does not necessarily make citizenship impossible.
Naturalisation is discretionary, and Home Office nationality guidance allows certain residence requirements to be considered flexibly in appropriate circumstances.
The strength of the case can depend upon matters such as:
Where discretion is required, the application should not simply present the travel figures and hope for approval.
It should identify the relevant discretion and provide a structured explanation supported by evidence.
The good-character requirement is one of the most important elements of naturalisation.
The Home Office can consider an applicant’s wider conduct rather than merely whether they have a criminal conviction.
Potentially relevant matters can include:
The seriousness of an issue depends upon its nature, timing and surrounding circumstances.
A historic problem does not necessarily mean citizenship can never be obtained. However, applicants should understand its effect before applying.
Full and accurate disclosure is essential.
Attempting to conceal an adverse matter can create a separate and potentially more serious good-character problem.
A criminal conviction requires careful consideration before a naturalisation application is submitted.
The Home Office can consider matters including:
Pending criminal proceedings may also affect whether it is appropriate to apply immediately.
Where an applicant has a criminal record, the issue should be assessed against current Home Office nationality guidance rather than assuming that a conviction either automatically prevents citizenship or is automatically irrelevant because it is old.
Previous immigration problems can also be relevant to citizenship.
These might include:
The effect of an immigration issue depends upon the circumstances and the applicable good-character guidance.
Applicants with a complicated history should therefore review their previous immigration applications and Home Office decisions before making declarations in a citizenship application.
Consistency with previous Home Office records is important.
Most adult naturalisation applicants must demonstrate sufficient knowledge of English, Welsh or Scottish Gaelic, unless exempt.
Depending upon the applicant’s circumstances, the requirement may be satisfied through:
Applicants should check whether their existing evidence remains acceptable rather than automatically booking another test.
Most adult applicants must also have passed the Life in the UK Test.
If the applicant already passed the test when obtaining ILR, they will not ordinarily need to take it again.
The Life in the UK Test currently costs £50.
Applicants who obtained permanent status through a route that did not require the test should check whether they now need to complete it for naturalisation.
A naturalisation application requires appropriate referees who meet the Home Office criteria.
Applicants should ensure their proposed referees satisfy the relevant requirements concerning matters such as:
Referees should not be selected simply because they are convenient.
Using someone who does not satisfy the requirements can create avoidable complications in an otherwise straightforward application.
Not every person who wishes to become British should apply for naturalisation.
Registration is a separate citizenship process available under particular provisions of British nationality law.
Registration is especially important for children, although some adults can also qualify.
The legal basis for registration depends upon the applicant’s circumstances, and some routes provide an entitlement to citizenship while others involve Home Office discretion.
Before preparing an application, it is therefore important to establish whether the person:
or
Choosing the correct legal route is fundamental.
A common misconception is that every child born in Britain is automatically British.
That is not correct.
For children born in the UK on or after 1 January 1983, citizenship generally depends upon the circumstances at birth.
A child born in the UK will usually be automatically British where, at the time of birth, at least one parent was British or settled in the UK.
Where neither parent was British or settled when the child was born, the child may later become entitled to register.
For example, a UK-born child under 18 may potentially register after a parent subsequently becomes British or obtains permanent settlement.
The child’s position should therefore be checked before paying for an unnecessary application—some children are already British automatically.
There is also an important registration route for a person who:
The ordinary requirement is that the person should not have spent more than 90 days outside the UK in each of those first ten years, although special circumstances can be considered.
This can create an entitlement to registration under section 1(4) of the British Nationality Act 1981 where the statutory requirements are met.
Children born outside Britain require a separate nationality assessment.
Whether a child is already British or can register can depend upon:
A parent’s successful naturalisation application does not automatically mean that every child born overseas becomes British.
Family applications should therefore consider each child’s position separately.
The United Kingdom permits dual citizenship.
British nationality law does not generally require a person to renounce their existing citizenship when becoming British.
However, the applicant’s existing country of nationality may have different rules.
Some countries restrict or prohibit dual nationality or may treat acquiring another citizenship as affecting existing nationality.
Applicants for whom retaining their original citizenship is important should therefore check the law of that country before naturalising.
A properly prepared citizenship application should normally involve:
Establish whether the applicant should naturalise, register or is already British.
Check ILR, settled status or other relevant nationality status and whether any required 12-month period has been completed.
Review the full five-year or three-year qualifying period and the final 12 months.
Confirm the applicant was physically present in the UK on the critical date.
Identify immigration, criminal, tax or other relevant matters before submission.
Ensure the requirements have been satisfied or an exemption applies.
Prepare appropriate supporting evidence and referee declarations.
The application is submitted to the Home Office and biometric requirements completed.
As at August 2026, the total fee for an adult naturalisation application is £1,839, comprising the £1,709 naturalisation fee and £130 citizenship ceremony fee.
The current registration fee for a child under 18 is £1,000.
The Home Office states that citizenship applications are usually decided within six months, although some cases can take longer. A citizenship priority service has also been available for eligible in-country applicants since July 2026.
Government fees and services can change and should be checked at the date of application.
Successful adult applicants are normally required to attend a citizenship ceremony.
The ceremony should generally take place within three months of receiving the Home Office invitation.
At the ceremony, the applicant makes the required oath or affirmation and pledge.
After completing the ceremony, the person becomes a British citizen and can proceed to apply for a British passport.
Problems frequently arise because applicants:
Citizenship applications are discretionary in important respects, which makes careful preparation particularly valuable where the case is not straightforward.
At Knights & Shah Solicitors, we advise individuals and families on British citizenship and nationality law.
We can assist with:
Our focus is to identify the correct nationality route, confirm eligibility and address potential risks before the application is submitted.
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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