British nationality · Children born in the UK · Reviewed 24 August 2026

Can a child become British after a parent obtains indefinite leave to remain?

A child who was not British at birth may acquire an entitlement to registration when a parent later becomes settled. The entitlement still requires an application.

Jayesh JethwaPartner · Head of Corporate & Private Immigration, Quastels

12 minute read

The legal position

A UK born child may be entitled to registration after a parent settles

A child born in the UK who was not British at birth can usually register as a British citizen under section 1(3) of the British Nationality Act 1981 if, while the child is under 18, a parent becomes British or settled in the UK. The child does not ordinarily need indefinite leave to remain first, but citizenship is acquired through registration, not automatically when the parent settles.

12 minute readPractical analysis · reviewed content

The decision in 60 seconds

The position in brief.

01
Check the child's place of birth, age and parental status before deciding whether nationality registration is a better route than another immigration application.
02
Birth in the UK does not by itself make every child British.
03
Section 1(3) applies when a parent later becomes British or settled.

British nationality at birth depends on more than the place of birth. Where neither parent was British or settled when a child was born in the UK, the child will not usually have become British automatically on that date.

The position can change when a parent subsequently obtains indefinite leave to remain or another qualifying form of settled status. Section 1(3) creates a potentially direct route to registration, making a separate settlement application for the child unnecessary in many cases.

The central judgmentCheck the child's place of birth, age and parental status before deciding whether nationality registration is a better route than another immigration application.

01 · Analysis

Birth in the UK does not by itself make every child British.

For children born in the UK after the relevant commencement of the British Nationality Act 1981, automatic citizenship at birth generally depends on whether a parent was British or settled at that time. The parent's status on the birth date is therefore the first question, not the present status alone.

Where neither parent met the relevant status requirement at birth, the child may nevertheless have a later entitlement to registration if the conditions of section 1(3) are satisfied. The application should not confuse automatic acquisition at birth with citizenship conferred through later registration.

02 · Analysis

Section 1(3) applies when a parent later becomes British or settled.

Section 1(3) concerns a child born in the UK who was not a British citizen at birth and whose parent subsequently becomes British or settled while the child remains under 18. The legislation and current Home Office nationality guidance should be checked against the precise family circumstances.

Indefinite leave to remain can establish the relevant parental settlement, as can another qualifying form of settled status where recognised by the nationality rules. The critical chronology is the UK birth, the parent's later qualifying status and the child's age at the date of the registration application.

03 · Analysis

The child does not normally need ILR before a section 1(3) application.

An entitlement under section 1(3) is not generally conditional on the child first holding indefinite leave to remain. Families should therefore compare the nationality route directly against the cost, timing and legal requirements of a separate child settlement application.

That does not mean the child's immigration position can be ignored. Current permission, travel plans, access to services and the period before registration is decided may still require practical consideration. Registration does not make the child British until the statutory process is completed.

04 · Analysis

The evidence must establish the child's birth and the parent's qualifying status.

The application typically requires evidence of the child's identity, UK birth and relationship to the parent, together with the parent's settled or British status. Previous immigration records and consistent personal details help prevent avoidable requests for further information.

The child must remain under 18 when applying under section 1(3). Families approaching that threshold should act early rather than assuming that a parent's recent settlement decision automatically preserves the child's entitlement beyond the age limit.

05 · Analysis

Citizenship, settlement and travel should be planned separately.

A parent's settlement application may create different outcomes for different children. A child born in the UK may be eligible for nationality registration, while a sibling born abroad may require a distinct settlement or family immigration analysis.

Before travel, parents should also consider whether the child has valid immigration permission or the appropriate travel documentation while the registration application is pending. A pending citizenship application is not itself a passport or proof that British nationality has already been acquired.

Nationality assessment

Establish whether registration can replace an unnecessary child settlement application.

The answer depends on birth, age, parental status and the statutory sequence.

StageQuestion or action

01Check the birth position

Confirm UK birth and whether either parent was already British or settled on the date of birth.

02Identify the later change

Verify when a parent became British or acquired qualifying settled status.

03Protect the age limit

Confirm that the child will still be under 18 when the section 1(3) application is submitted.

04Prepare the evidence

Compile birth, identity, parental relationship and settled status documents alongside the current application requirements.

05Plan the interim period

Review existing permission, travel and the position before the registration decision and any passport application.

Apply the framework

Assess whether the child can register directly as British.

Quastels can review the child's birth, parental status, nationality entitlement and any immediate travel or immigration issue.

Review a child's citizenship position ↗

Practical questions

What to clarify before taking the next step.

01Does my UK born child automatically become British when I get ILR?+

No. The parent's settlement may give the child an entitlement to register under section 1(3), but citizenship is not acquired automatically when the parent obtains ILR.

02Does a child need ILR before applying for British citizenship under section 1(3)?+

Usually not. A UK born child who meets the section 1(3) requirements can generally apply for registration without first obtaining indefinite leave to remain.

03Does the child have to be under 18?+

Yes. A section 1(3) application is for a child and should be made while the applicant is under 18.

04What if my child was born outside the UK?+

Section 1(3) addresses UK born children. A child born abroad requires a different assessment under the relevant nationality, settlement or family immigration provisions.

05Can my child travel while a British citizenship application is pending?+

A pending application does not itself establish British citizenship or provide a British passport. The child's existing immigration permission and travel documents should be checked before travel.

Primary sources

Rules and official guidance.

Reviewed 24 August 2026. Immigration Rules and Home Office guidance change frequently. Check the current text and the complete facts before acting.

01British Nationality Act 1981 ↗02Home Office guidance: registration of children as British citizens ↗03Form MN1: registration guidance ↗

How to use the source record +

Start with the current legal instrument, then verify commencement, transitional wording and relevant guidance against the application date and complete facts. Publication on this site does not freeze the underlying source.

Continue within this subject

Plan the family's status as one connected position.

Partner, child, residence, travel and settlement questions can produce different answers for different family members. The next application should preserve the intended longer-term position.

About the author

Jayesh Jethwa

Jayesh is a Partner and Head of Corporate & Private Immigration at Quastels. He advises businesses, founders, internationally mobile families and individuals on immigration decisions that require legal judgment, commercial understanding and careful evidence.

About Jayesh and his work →Verified Quastels profile ↗

Family and status review

Map the family’s onward position, not an isolated application.

Quastels can review present status, family relationships, travel, work, children and the settlement or citizenship position the next step should preserve.

Map the family’s onward position ↗