The Romein case changed British citizenship claims by removing the biggest obstacle facing people born abroad before 1983 to British mothers. In Advocate General for Scotland v Romein [2018] UKSC 6, the UK Supreme Court held that applicants under Section 4C of the British Nationality Act 1981 no longer need to prove their birth would have been registered at a British consulate. Because mothers were never allowed to register their children in the first place, the Court ruled that requirement should be treated as inapplicable when citizenship is claimed through the maternal line.1UK Supreme Court. Advocate General for Scotland v Romein [2018] UKSC 6 If you were previously refused on that basis, or held back from applying because you assumed you could never produce the evidence, the door is now open.
What the Court Decided
The dispute was narrow. Under the British Nationality Act 1948, a child born abroad could inherit citizenship through the father’s line. Where the father was a citizen by descent only, the child still qualified provided the birth was registered at a British consulate. Mothers had no right to pass on citizenship at all, so the consular route never applied to them.
Section 4C was introduced to correct this by instructing decision-makers to imagine the 1948 Act had treated mothers the same as fathers. The Home Office argued that the counterfactual also required proof that the mother would in fact have gone to a consulate and registered the birth. On 8 February 2018, the Supreme Court rejected that reading. A mother who knew the law barred her would never have attempted registration, and would have left no trail of intent to do so. Section 4C(3D), the Court held, exists precisely to prevent that kind of unrealistic historical inquiry.
The practical effect is straightforward. Absence of consular registration can no longer be used as a ground of refusal in a maternal-line Section 4C claim.
Who Can Claim Under Section 4C After Romein
Section 4C creates an entitlement, not a discretionary grant. Meet the conditions and the Home Office must register you.2Legislation.gov.uk. British Nationality Act 1981 Section 4C There are three:
- You were born before 1 January 1983. After that date the law already treated mothers and fathers equally.
- You would have become a Citizen of the United Kingdom and Colonies if the 1948 Act (Assumption A) or the earlier laws it replaced (Assumption B) had allowed citizenship to pass through mothers on the same terms as fathers.
- Immediately before 1 January 1983, you would have held the right of abode in the UK under Section 2 of the Immigration Act 1971 on that same hypothetical basis.
The typical successful applicant was born abroad to a mother who was herself born in the UK or had settled there. Where the mother’s CUKC status came from a former colony rather than the UK itself, the right-of-abode condition can be harder to satisfy, and a different route may fit better.
What the Ruling Removed From Your Application
Before Romein, most refusals turned on the missing consular registration. That ground is gone. Two other features of the Section 4C route are worth knowing about because they make it considerably more forgiving than most citizenship applications.
There is no good character test. The British Nationality Act 1981 (Remedial) Order 2019 stripped the good character requirement out of Section 4C entirely.3Legislation.gov.uk. The British Nationality Act 1981 (Remedial) Order 2019 Parliament took the view that imposing a character judgment on people who were denied citizenship because of their mother’s gender would deepen the original injustice. A criminal record or immigration history that would sink other citizenship applications will not sink this one.
There is also no deadline. Section 4C sets no time limit and no cut-off. You can apply at any age. The only practical pressure is evidential: the older the claim gets, the harder documentary proof can be to assemble.
Documents That Prove a Section 4C Claim
Applications use Form UKM, the registration form for a person born before 1983 to a British mother.4GOV.UK. Form UKM – Application for Registration as a British Citizen by a Person Born Before 1983 to a British Mother The evidence falls into two categories.
Your Birth and Parentage
You need a full original birth certificate showing both parents. A short-form certificate that lists only your name and date of birth will not do, because it does not establish the maternal link. Certificates in languages other than English need a certified translation meeting Home Office standards.
Where standard documentation is missing or damaged, DNA evidence may be accepted as a supplement, though it cannot fully replace a birth certificate. DNA testing is always voluntary; the Home Office cannot compel it. If you use it, the laboratory must hold ISO/IEC 17025 accreditation and the sample must be collected to Home Office standards.5GOV.UK. DNA Testing for British Passport Applications
Your Mother’s Citizenship
You must show your mother was a Citizen of the United Kingdom and Colonies when you were born. Her UK birth certificate is the cleanest evidence. Naturalisation or registration certificates work if she acquired citizenship that way. A British passport valid at the relevant time is also good evidence.
If she was born in a former colony, expect a more layered evidential picture. She may well have held CUKC status through the colony’s link to the UK, but the right-of-abode condition still has to be met, so you may also need records of her residence in the UK or of her own parents’ British birth.
Applying With Form UKM
Completed forms and supporting documents go to the Home Office through the online portal or by registered post. Once submitted, applicants provide biometric information, including a facial photograph and fingerprints. From overseas, that means either attending a biometric enrolment centre in person or using the UK Immigration: ID Check app where available.6GOV.UK. Biometric Enrolment Policy Guidance
Form UKM references an application fee, and the citizenship ceremony carries a separate fee of £130 as of 8 April 2026.7GOV.UK. Home Office Immigration and Nationality Fees, 8 April 2026 Fees are updated annually each April, so check GOV.UK before applying.
Approval alone does not make you a citizen. You must attend a citizenship ceremony and take the oath of allegiance for the registration to take effect. The Home Office issues the invitation after approval. In the UK, ceremonies are arranged through local councils; from abroad, through the nearest British consulate or embassy.
The Home Office does not publish a specific processing target for UKM applications. Claims that need historical research into colonial-era records tend to take longer. If several months pass with no update, you can ask the Home Office for a status check.
What Happens With Your Own Children
This is the point where Section 4C often disappoints. British citizens are classified as either “by descent” or “otherwise than by descent.” Citizens otherwise than by descent can pass citizenship to children born anywhere. Citizens by descent generally cannot pass it to children born outside the UK or its territories. Registration under Section 4C typically gives you citizenship by descent.
So if you have a child born outside the UK, either before or after your own registration, that child’s British citizenship is not automatic. A separate registration application may be needed. Guide MN1 sets out the routes for registering a child, including one that applies where a parent is about to become or has just become British, though it comes with conditions such as at least two years of UK residence and settled status for the child.8GOV.UK. Guide MN1 – Registration as a British Citizen For families living overseas, those residency requirements often make the route impractical.
When Section 4L May Serve You Better
The Nationality and Borders Act 2022 opened newer routes for people affected by historical unfairness in nationality law.9Legislation.gov.uk. Nationality and Borders Act 2022 Section 4L is the one worth weighing against a Section 4C claim. It is a broader safety-net provision for adults who would have been, or could have become, British citizens but for historical legislative unfairness, an act or omission by a public authority, or exceptional circumstances. Crucially, registration under Section 4L results in citizenship otherwise than by descent, so children born abroad can inherit citizenship from you.10GOV.UK. Guide ARD – Registration as a British Citizen
Some people who qualify under Section 4C may be better served by Section 4L in the long run for that reason alone. The eligibility criteria are different, and the good character requirement may still apply to Section 4L, so this is a route to consider rather than an automatic upgrade. Section 4K, meanwhile, addresses claims through a British Overseas Territories Citizen mother where the Section 4C right-of-abode condition cannot be met.11GOV.UK. Registration as a British Citizen in Special Circumstances
If the Home Office Refuses
A refusal is not the end. You can request a review using Form NR, which is designed for cases where you believe the decision was not soundly based on law or policy.12GOV.UK. Application for Review When British Citizenship Is Refused – Form NR Beyond administrative review, judicial review in the courts remains available where the Home Office has misapplied the law. The Romein case itself came out of exactly that kind of challenge, and it shows the courts are willing to overturn interpretations that keep old discrimination alive.