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What Happens Legally If Courts Discover an Asylum Seeker Lied About Their Age?

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Posted: 21st November 2025
George Daniel
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In this Article

A deep legal analysis behind a case raising urgent questions for the UK’s asylum and criminal justice systems.


A Legal Analysis of an Unresolved Question

A recent murder case involving an asylum seeker whose age is now disputed has pushed an uncomfortable issue into public view: what the UK legal system actually does when someone’s claimed age appears to be false. In this instance, the court has ordered a medical scan to determine whether the individual is a teenager or an adult — a detail that could materially alter sentencing.

But this story taps into a far broader and less understood problem: what are the legal consequences when an asylum seeker’s age is found to be inaccurate, and what does UK law allow courts and immigration authorities to do next? This analysis breaks that down.


Why This Is the Big Unanswered Question

Age isn’t just a biographical detail in the asylum process — it determines everything from housing placement to safeguarding obligations to the severity of a prison sentence. When a defendant claims to be under 18 or even under 21, the justice system treats them markedly differently because UK sentencing law is structured around the science of youth brain development and diminished culpability.

So when the public hears that a defendant might not be the age they claimed, the immediate question becomes: what happens if that claim turns out to be untrue?
Does it count as fraud? Does it change asylum status? Does it affect the criminal sentence? Does the Home Office get involved?

These are the unresolved layers the news didn’t address — and the ones readers instinctively want answered.

Deng is wearing a grey top in a police mugshot. He has short dark hair.

During his trial, Majek, originally from Sudan, claimed he was 19, but prosecutors said they believed he was older.


What the Headlines Left Out About Age Disputes and Criminal Liability

The coverage focused on the imminent sentencing and the fact that the court ordered a CT scan to verify age. But it didn’t explain:

  • Whether lying about age is a criminal offence in itself.

  • How the Home Office treats inaccurate age claims after a conviction.

  • Whether age discrepancies affect asylum eligibility or deportation decisions.

  • How far UK courts rely on medical imaging for age determination — and what margin of error exists.

  • What legal jurisdiction handles the aftermath: the trial judge or the immigration authorities?

These omissions matter because the consequences extend far beyond a single sentencing decision.


The Deeper Context

1. Age Assessment in UK Asylum Law

Age disputes have been a recurring issue for more than two decades. Under the Immigration and Asylum Act 1999 and subsequent Home Office guidance, individuals claiming to be children must be treated as minors unless their appearance “very strongly suggests” they are over 18.
Local authorities, not the Home Office, conduct formal age assessments — a system shaped by the landmark R (B) v Merton London Borough Council [2003] ruling, which set strict standards for how those assessments should be carried out.

The Supreme Court in A v Croydon [2009] later affirmed that age is ultimately a question of fact, and that courts themselves can adjudicate disputed ages.

2. Lying About Age Is Not Automatically a Criminal Offence — But It Can Become One

There is no standalone law criminalising an inaccurate age claim during an asylum application. However:

  • Fraud by false representation under the Fraud Act 2006 can apply if the misstatement was deliberate and used to obtain a benefit (such as child safeguarding services, education, or accommodation).

  • Obstruction of justice can apply if the false age affects court proceedings.

  • Perverting the course of justice has been used in rare cases where officials deliberately misled the court about identity details.

Historically, these charges are used sparingly because courts must show intent — which is harder to prove in asylum cases where documents may be lost or unreliable.

3. Age Determines Sentencing

Under the Sentencing Council’s guidelines for murder and violent offences, defendants under 18 face substantially lower starting points. Even 18–20-year-olds receive judicial consideration for developmental immaturity.

If a court discovers the defendant is older than claimed, the sentencing bracket changes immediately. This is one of the strongest incentives in the system for misrepresenting age — and a major point of public scrutiny.

4. Immigration Consequences After a Conviction

A serious criminal conviction automatically triggers a deportation review.
Under the UK Borders Act 2007, a non-citizen convicted of an offence resulting in a sentence of 12 months or more is subject to automatic deportation unless specific exemptions apply (such as human rights protections).

If age is found to have been misrepresented:

  • The Home Office may reassess asylum credibility.

  • A misrepresentation may undermine claims of vulnerability or risk.

  • A conviction of this severity almost always leads to the deportation process beginning from prison.

In practice, age disputes become part of a larger credibility assessment.


What Independent Experts Typically Say About Issues Like This

Legal scholars often point out that most age disputes arise from systemic failures rather than deliberate deceit: conflict zones lack reliable birth records, and young migrants frequently travel alone with no documentation.

Analysts generally note three recurring themes:

  1. Intent matters.
    Courts distinguish between uncertainty, mistake, and deliberate misrepresentation. Only the last category leads to criminal consequences.

  2. Age assessments are imperfect.
    Medical scans (such as dental X-rays or CT scans of the clavicle) can estimate age ranges, but they come with margins of error — something experts routinely caution against over-relying on.

  3. The asylum process already has built-in credibility assessments.
    If age is wrong, the consequence is usually administrative — reclassification as an adult — unless the misstatement directly affected a criminal trial.

  4. The UK rarely prosecutes asylum-seeking children for age discrepancies.
    Prosecuting vulnerable migrants for inconsistent age claims is widely viewed as disproportionate unless linked to major harm or deception.

This reflects the tension between safeguarding, fairness, and the need to avoid exploiting the system.


What Happens Next

1. If the Court Determines the Defendant Is Older

The outcome is straightforward in criminal law:

  • The sentencing guidelines for adults will apply.

  • Any mitigation linked to youth is removed.

  • The judge may reference misleading information if it affected the trial.

2. Home Office Review Is Almost Certain

After sentencing, immigration authorities routinely reassess:

  • asylum credibility,

  • risk factors,

  • suitability for deportation.

If the defendant is found to be older, this typically strengthens the argument for deportation post-sentence, especially in cases involving violence.

3. A Credibility Finding May Affect Future Appeals

Any finding that age was deliberately misrepresented can negatively affect:

  • asylum appeals,

  • human rights claims,

  • credibility assessments under the Refugee Convention.

However, courts are cautious about assuming deliberate deception without compelling evidence.

4. The CT Scan Result Will Shape the Next Legal Steps

This is the only factual element directly tied to the current case.
If the scan is inconclusive — as age imaging sometimes is — the court may rely on:

  • behavioural assessments,

  • immigration records,

  • expert reports,

  • or previous official documentation.

5. The Broader Policy Conversation

Expect renewed public and political attention on:

  • mandatory age-testing for asylum seekers,

  • tightening of initial age assessments,

  • safeguarding failures,

  • and deportation procedures following serious offences.

These debates tend to intensify after high-profile violent crimes involving migrants.


Frequently Asked Questions About Age Disputes in UK Asylum Cases

1. Is it a crime for an asylum seeker to lie about their age in the UK?

Not automatically. There is no single offence for giving an incorrect age, but intentional deception can fall under the Fraud Act 2006 or offences related to misleading the court. Most age disputes do not lead to prosecution unless there is clear evidence of deliberate fraud.

2. Can the Home Office revoke asylum protection if age was misrepresented?

It can affect credibility, but age alone does not automatically revoke refugee status. However, a serious criminal conviction combined with misrepresentation greatly increases the likelihood of deportation proceedings.

3. How accurate are CT scans in determining someone’s age?

CT scans of the clavicle can estimate age ranges but carry error margins of several years. Courts use them as supporting evidence, not definitive proof.

4. What happens to sentencing if the defendant is ruled to be an adult?

Sentencing guidelines for adults apply immediately. In murder cases, the difference can be significant because youth sentencing considers developmental immaturity.

5. Can a false age claim be used against someone in future immigration appeals?

Yes. Credibility is central to asylum law. Any proven misrepresentation — including age — can be cited in future appeals, though courts distinguish between honest mistakes and deliberate deception.

6. Does a criminal conviction automatically lead to deportation?

Under the UK Borders Act 2007, a conviction leading to a sentence of 12 months or more triggers automatic deportation consideration. Serious violent offences almost always prompt this review.

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About the Author

George Daniel
George Daniel has been a contributing legal writer for Lawyer Monthly since 2015, covering consumer rights, workplace law, and key developments across the U.S. justice system. With a background in legal journalism and policy analysis, his reporting explores how the law affects everyday life—from employment disputes and family matters to access-to-justice reform. Known for translating complex legal issues into clear, practical language, George has spent the past decade tracking major court decisions, legislative shifts, and emerging social trends that shape the legal landscape.
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