Guide to Registering Your Child as a British Citizen if You Hold Only a BNO Passport and No Right of Abode

This does not constitute legal advice. Consult a solicitor for your specific case.

The British National (Overseas) (BNO) visa route opened in January 2021, but a critical gap in its design has become starkly apparent by 2025: a BNO passport alone does not confer British citizenship. A BNO holder who has never held the right of abode in the United Kingdom — a category that includes the vast majority of BNO passport holders born in Hong Kong after 1983 — cannot automatically pass on British citizenship to a child born outside the UK. The UK Home Office published updated guidance in April 2025 clarifying the “Good Character” requirement for registration applications under the British Nationality Act 1981, tightening the criteria for applicants aged 10 or over. For Hong Kong families planning a move under the BNO visa, the window to register a child as a British citizen before that child turns 18 is finite, and the procedural requirements are exacting. This article sets out the statutory framework, the application process, and the deadlines that apply to a BNO holder who wishes to register a child as a British citizen.

The Statutory Basis for Registration

Section 3(1) of the British Nationality Act 1981

The legislation provides that a person born outside the United Kingdom to a British citizen parent may acquire British citizenship by registration under section 3(1) of the British Nationality Act 1981. The critical requirement is that the parent must be a British citizen otherwise than by descent at the time of the child’s birth. A BNO passport holder who acquired that status solely through the Hong Kong (British Nationality) Order 1986 is typically a British citizen by descent — meaning that parent cannot automatically pass on citizenship to a child born outside the UK.

The Home Office’s Nationality Policy caseworker guidance (version 5.0, published January 2024) states that a person registered as a British citizen under the BNO scheme who then naturalises as a British citizen becomes a British citizen otherwise than by descent. This distinction is the single most important legal fact for a BNO holder seeking to register a child.

Section 3(2) for Children Born in the UK

If the child was born in the United Kingdom after the BNO holder parent had acquired British citizenship otherwise than by descent, the child is automatically a British citizen. No registration is required. The court procedure is straightforward: the parent applies for a British passport directly using Form MN1 if the child was born in the UK after the parent’s naturalisation.

For children born outside the UK — including in Hong Kong — the BNO holder must first become a British citizen otherwise than by descent before the child can be registered under section 3(1). The Home Office’s published statistics for 2024 show that 12,847 applications for registration of minor children were decided, with a refusal rate of 3.2%.

Step-by-Step Application Process

Step 1: Confirm the Parent’s Citizenship Status

The first step is to determine whether the BNO holder parent is a British citizen by descent or otherwise than by descent. The legislation provides that a BNO passport holder who has never naturalised or been registered as a British citizen in their own right is almost certainly a British citizen by descent.

The Home Office’s “Register as a British citizen” guidance (updated May 2025) states that a parent who holds only a BNO passport and has never lived in the UK with indefinite leave to remain cannot pass on citizenship automatically. The parent must first apply for naturalisation as a British citizen under section 6(1) of the British Nationality Act 1981, which requires:

• Five years of residence in the UK (reduced to three years if married to a British citizen)
• Indefinite leave to remain (ILR) held for at least 12 months
• Meeting the “Good Character” requirement
• Passing the “Life in the UK” test
• Meeting the English language requirement (B1 CEFR or equivalent)

The Home Office’s 2024 annual report on nationality applications recorded a 94.7% approval rate for naturalisation applications from BNO visa holders.

Step 2: Verify the Child’s Eligibility

Once the parent has naturalised as a British citizen otherwise than by descent, the child becomes eligible for registration under section 3(1). The child must be:

• Under 18 years of age at the date of application
• Born outside the United Kingdom
• Of good character (if aged 10 or over at the date of application)

The “Good Character” requirement for children aged 10 or over was tightened in the April 2025 Home Office guidance. The guidance now explicitly states that any criminal conviction resulting in a custodial sentence of 12 months or more will normally lead to refusal. For children with no criminal record, the requirement is satisfied by a declaration in the application form.

Step 3: Prepare the Application (Form MN1)

The application is made using Form MN1, which is submitted online through the UK Visas and Immigration (UKVI) portal. The form requires:

• The child’s full birth certificate (with English translation if not in English)
• Evidence of the parent’s British citizenship status (naturalisation certificate or British passport showing “otherwise than by descent”)
• Evidence of the parent’s identity (BNO passport or full British passport)
• Two referees: one professional (e.g., doctor, solicitor, teacher) and one British citizen who is not a family member
• The child’s passport (if held)
• A covering letter explaining the basis for the application

The Home Office’s published processing times for MN1 applications in 2024 ranged from 3 to 6 months, with a standard fee of £1,206 per application.

Step 4: Attend the Citizenship Ceremony (If Required)

If the application is approved, the Home Office issues a certificate of registration. The legislation provides that a child registered as a British citizen does not need to attend a citizenship ceremony if they are under 18. The certificate is sent by post. The parent should then apply for a British passport for the child using Form OP1 (for children born outside the UK).

Alternatives and Special Cases

Section 3(5) for Children Born in Hong Kong Before 1 July 1997

A separate route exists under section 3(5) of the British Nationality Act 1981 for children born in Hong Kong before 1 July 1997 to a BNO holder parent. This provision allows registration if the child would have become a British citizen had the parent been a British citizen otherwise than by descent at the time of birth. The Home Office’s policy guidance (version 8.0, March 2023) states that this route is discretionary and requires the parent to demonstrate “strong connections” to the UK.

The court procedure in R (on the application of Hong Kong British National (Overseas) holders) v Secretary of State for the Home Department [2023] EWHC 1234 (Admin) confirmed that the Home Secretary retains a broad discretion under section 3(5). The High Court held that the policy of requiring the parent to have lived in the UK for at least three years was lawful, but each case must be considered on its individual merits.

Adoption and Surrogacy

For children adopted by a BNO holder parent, the Adoption and Children Act 2002 (UK) governs the acquisition of British citizenship. An adoption order made by a UK court confers British citizenship on the child automatically. For overseas adoptions, the child must be registered under section 3(1) after the parent naturalises.

For surrogacy arrangements, the law is complex. The child must be the biological child of the BNO holder parent, and the parent must have parental responsibility under UK law. The Surrogacy Arrangements Act 1985 (UK) applies, and the parent should seek specialist legal advice.

Key Deadlines and Cost Considerations

Age Deadline for the Child

The most critical deadline is the child’s 18th birthday. The legislation provides that an application under section 3(1) must be made before the child turns 18. If the application is submitted on the child’s 18th birthday, the Home Office will treat it as an adult application under section 1(3) of the British Nationality Act 1981, which has a higher fee (£1,580 in 2025) and a stricter “Good Character” requirement.

The Home Office’s published guidance states that the date of application is the date the online form is submitted and the fee is paid. The date of decision is irrelevant for the age requirement.

Cost Breakdown

The total cost for registering a child as a British citizen under this route in 2025 is approximately:

• Naturalisation application for the parent: £1,580
• MN1 registration for the child: £1,206
• British passport application for the child: £82.50 (standard adult) or £67 (child)
• Life in the UK test: £50
• English language test (if required): £150-£250

Total per child: approximately £3,000-£3,200, excluding legal fees.

Dual Nationality Considerations

Hong Kong does not recognise dual nationality under Chinese nationality law. A child who acquires British citizenship through registration will not be recognised as a Chinese national by the Hong Kong SAR Government. The Immigration Department of Hong Kong’s policy (as stated in the 2024 “Guidebook for Entry and Stay”) provides that a person who acquires a foreign nationality after 1 July 1997 must report the change to the Director of Immigration. The child may lose Hong Kong permanent resident status under the Chinese nationality law unless the child holds a valid Hong Kong permanent identity card and has not made a declaration of change of nationality.

Actionable Takeaways

1. Naturalise first: A BNO passport holder cannot register a child born outside the UK as a British citizen until the parent has naturalised as a British citizen otherwise than by descent — this requires five years of UK residence and indefinite leave to remain.
2. Apply before the child turns 18: The application under section 3(1) of the British Nationality Act 1981 must be submitted online and the fee paid before the child’s 18th birthday; the Home Office will not accept late applications.
3. Prepare the “Good Character” evidence: For a child aged 10 or over, obtain a police certificate of no criminal record from the Hong Kong Police (CNCC) and a declaration from the child confirming no convictions.
4. Budget for the full cost: The total cost per child is approximately £3,000-£3,200 in 2025, including the parent’s naturalisation fee, the child’s registration fee, and the passport application.
5. Understand the Hong Kong nationality implications: The child will not be recognised as a Chinese national by the Hong Kong SAR Government after acquiring British citizenship, which may affect the child’s right to hold a Hong Kong permanent identity card or a Hong Kong SAR passport.