New UK entry rules for British dual nationals from 25 February 2026

As of 25 February 2026, the United Kingdom has implemented significant changes to border entry requirements that fundamentally affect British dual nationals. Introduced as part of the government's Electronic Travel Authorisation (ETA) scheme, these changes now require British citizens holding dual nationality to present specific documentation when entering the UK – a requirement that has caught many travellers unaware and unprepared.

With over a decade of experience advising on complex UK immigration matters, our solicitors recognise that this represents one of the most significant procedural shifts affecting dual nationals in recent years.

Understanding what has changed, whether you are affected, and what action you must now take is essential.

The new requirements: what has changed?

Historically, British dual nationals whose second nationality was from a visa-exempt country could enter the UK using only their foreign passport. Whilst not officially encouraged, this practice was generally accepted at UK border control without significant impediment.

New framework from 25 February 2026

The introduction of the ETA enforcement regime has fundamentally altered this position. British dual nationals are now explicitly prohibited from entering the UK using only their foreign passport, regardless of whether that nationality would otherwise qualify for visa-free travel.

Under the new rules, British dual nationals must present one of the following documents when travelling to the UK:

1. A valid British passport.
2. A valid Irish passport (Irish dual nationals only).
3. A Certificate of Entitlement to the Right of Abode attached to their foreign passport.

Failure to present appropriate documentation may result in denied boarding by carriers (airlines, ferry companies, rail operators) or refusal of entry at UK border control.

Understanding the electronic travel authorisation (ETA) system

The catalyst for these changes is the UK government's implementation of a comprehensive ETA system, which came into full enforcement on 25 February 2026.

What is an ETA?

An ETA is a digital authorisation required for visitors to the UK who:

• Do not need a visa for short stays (up to six months).
• Do not hold UK or Irish citizenship.
• Do not already possess UK immigration status.

The ETA currently costs £16 (with plans to increase to £20) and permits multiple journeys to the UK over two years or until passport expiry, whichever occurs first.

Why can't dual nationals apply for an ETA?

British and Irish citizens are explicitly exempt from the ETA requirement, including dual nationals. However, this exemption creates an enforcement challenge. Carriers and border officials must verify British citizenship before permitting travel. The government's solution has therefore been to require documentary proof of British citizenship in the form of a British passport or Certificate of Entitlement.

This reflects a wider shift towards a digital permission border control system, where carriers conduct automated checks against Home Office records before departure.

Which British dual nationals are most at risk?

Whilst the rule applies to all British dual nationals, in practice, disruption is most likely to affect the following groups:

1. Naturalised British citizens who never obtained a British passport. Many individuals continued travelling on their original nationality passport, unaware that documentary evidence of British citizenship would become mandatory.
    
2. Long-term UK residents with dual nationality currently abroad. Those on extended trips overseas may face logistical challenges, including limited access to application services and extended processing times.
    
3. EU nationals who acquired British citizenship post-Brexit. Many retained their EU passports as their primary travel document and may not have immediately obtained a British passport.
    
4. Families with children born abroad to British parents. Children who acquired British citizenship by descent but travel on another nationality passport may now encounter difficulties.
    
5. British citizens abroad for work, study, or family reasons. Extended stays overseas mean individuals may be outside the UK when documentation requirements take effect.

Legal basis and government rationale

These changes are implemented under the Immigration Act 1971 and subsequent amendments relating to carrier liability and permission to enter the UK. The ETA system operates under statutory instruments establishing the requirement for digital travel authorisation.

The Home Office has identified three primary objectives:

1. Enhanced border security through pre-travel screening and criminality checks.
2. International alignment with systems used in the United States, Canada, and Australia.
3. Digital modernisation of border processes.

From a constitutional perspective, the UK is entitled to define its entry documentation standards. However, communication gaps and transitional issues have led to practical disruption.

Practical implications and case examples

The practical consequences of these changes are already being felt by British dual nationals travelling to and from the UK.

Recent media reports have documented numerous cases of dual nationals facing significant disruption:

• Individuals stranded abroad without emergency travel documents.
• Work commitments jeopardised due to inability to return to the UK on schedule.
• Unexpected costs for expedited passport applications and travel changes.
• Family separations where some members possess appropriate documentation and others do not.

Enforcement mechanism

Enforcement responsibility now sits largely with carriers. Airlines, ferry companies, and rail operators conduct digital checks against Home Office databases before boarding. Passengers may therefore be denied boarding at check-in if documentation cannot be verified.

At the UK border, Border Force officers retain discretion to conduct further checks, but disruption typically occurs before departure rather than on arrival.

Your options: practical steps for compliance

Based on our experience advising on UK immigration matters, the following routes are available.

Option 1: apply for a British passport (recommended)

Advantages:

• Standard 10-year validity for adults, five years for children.
• Most cost-effective long-term solution.
• Full consular protection abroad.
• Access to UK e-gates.
• Clear proof of British citizenship.

Application process:

• Online application via GOV.UK (standard service approximately three weeks).
• Fast Track service available.
• Premium service available for urgent cases.
• Submission of current passport during processing.

Considerations:

• Processing times may extend during peak periods.
• Travel is not possible using a passport submitted for renewal.
• Additional documentation may be required.

For most dual nationals with ongoing ties to the UK, this is the most practical and economically sensible solution.

Option 2: obtain a certificate of entitlement to right of abode

Advantages:

• Allows use of foreign passport for travel whilst proving British citizenship status.
• Permanent endorsement (no expiry date tied to document validity).
• Suitable for those who prefer maintaining a foreign passport as their primary travel document.

Disadvantages:

• Significantly more expensive – current cost is £589.
• Must be renewed when the foreign passport expires (requiring a new application and fee).
• No consular protection benefits.
• More complex application process.
• Much less cost-effective than a British passport over time.

Application process:

• Online or postal application via GOV.UK.
• Requires evidence of British citizenship and current foreign passport.
• Processing time typically several weeks.
• For applicants abroad, attendance at a British embassy or consulate may be required.
• A vignette (sticker) is placed in the foreign passport or a digital version attached to the passport.

For most dual nationals, the cost differential means this option is rarely the most practical solution.

Option 3: emergency travel document

When applicable:

• Urgent travel required before a standard passport can be obtained.
• Currently outside the UK and need to return immediately.
• Previous British passport holder who can demonstrate citizenship status.

Process:

• Application via a British embassy, consulate, or high commission in the country of current location.
• Requires proof of previous British citizenship (for example, an expired passport or citizenship certificate).
• Typically issued for a single journey or limited period.
• May be subject to additional scrutiny at the UK border.

Limitations:

• Intended for genuine emergency situations only.
• Does not replace the need for a valid passport for future travel.
• May not be accepted by all countries for onward travel.
• Border Force retains discretion regarding admission.

Emergency travel documents should not be viewed as a substitute for proper documentation planning.

Option 4: expired British passport (temporary concession)

The Home Office has issued temporary guidance indicating that carriers may accept:

• An expired British passport (issued in 1989 or later), and
• A valid foreign passport from an ETA-eligible nationality.

Biographic details must match on both documents.

Critical limitations:

• Acceptance is discretionary – carriers may refuse to accept expired passports.
• Passengers using this concession may face additional checks at UK border control.
• This is a temporary operational concession, not a permanent solution.
• Border Force officers retain discretion to refuse entry if citizenship cannot be verified.
• It is strongly not recommended as a planned approach.

Frequently asked questions

Below are the most common questions raised by British dual nationals since the new rules came into force.

1. Can a British citizen really be refused entry to the UK?
   
   British citizens have an unqualified right to enter the UK. However, proof of citizenship must be provided at the point of travel. Without appropriate documentation, carriers may refuse boarding and additional verification may occur at the border.
    
2. I have travelled on my foreign passport for years without issue. Why has this changed?
   
   Previous informal tolerance has been replaced by formal digital enforcement linked to the ETA system. Past practice no longer guarantees acceptance.
    
3. Can I apply for an ETA using my foreign passport instead?
   
   No. British and Irish citizens are ineligible to apply for an ETA, regardless of which passport they wish to use.
    
4. Should I renounce my British citizenship?
   
   Renunciation is a serious and generally irreversible decision with significant legal consequences. Specialist advice should always be sought before considering this step.
    
5. What if my British passport has expired?
   
   Temporary carrier concessions may apply, but renewal remains the only reliable solution.

Our professional recommendations

If you are affected:

1. Review your documentation status immediately.
2. Apply for a British passport if you do not hold a valid one.
3. Use expedited services where travel is imminent.
4. Ensure all family members are properly documented.
5. Seek specialist advice if your circumstances are complex.

Guidance from our immigration solicitors

Our immigration law specialists advise on citizenship status assessments, British passport applications, Certificates of Entitlement, emergency travel documentation, and complex nationality cases. Where urgency arises, we provide strategic advice to minimise disruption and liaise with the relevant authorities where appropriate.

The changes to UK entry requirements for British dual nationals represent a significant procedural shift. Whilst grounded in security and digital modernisation objectives, the practical effect has been widespread disruption for those unprepared. The time to address your documentation is before you travel, not at the airport.

If you are unsure how these changes affect you, our immigration solicitors are ready to advise. Get in touch to speak with our team.

This article is for general information only and does not constitute legal advice. Individual circumstances vary, and you should seek specialist advice tailored to your situation before making travel or documentation decisions.