From 25 February 2026, new UK travel rules governing how British citizens – particularly those with dual nationality – travel to and enter the United Kingdom have changed fundamentally.
The Home Office has now fully implemented a policy requiring all British citizens, including those who hold more than one nationality, to demonstrate their citizenship specifically with appropriate British documentation before they are allowed to board transport to the UK and enter the country.
Written by Zhuoqi Liu, Legal Advisor
Under the new system, airlines, ferry operators and other carriers are legally required to check that passengers possess valid permission to travel. For British citizens that now means presenting either a current British passport or a valid document known as a Certificate of Entitlement confirming the person’s right to enter as a British citizen.
This change is part of the UK’s transition to a fully digital travel and immigration control system. Previously, many British dual nationals could enter the UK on the passport of their other nationality without producing a British-issued document. That practice is now no longer sufficient in most cases, particularly for travel after 25 February.
British and Irish Citizens Exempt from Needing an ETA
The Home Office policy emphasises that British and Irish citizens are exempt from needing an Electronic Travel Authorisation (ETA) for entry, but it also makes clear that carriers may refuse to allow passengers to board flights, ferries or other transport if they cannot prove their British citizenship with the right documentation.
What is a Certificate of Entitlement?
The Certificate of Entitlement is a document attached to a person’s foreign passport that confirms their right of abode in the UK. It must be applied for in advance and linked to an individual’s identity; its issuance is not automatic with citizenship and requires a separate application to the Home Office. Expired British passports issued since 1989 may be accepted by carriers at their discretion alongside a valid foreign passport, but this remains subject to airline or operator policy and is not guaranteed.
For many British citizens living abroad or those born overseas who have never held a British passport, this development has come as a shock and caused considerable confusion and disruption. Reports indicate that dual nationals have been caught out by the requirement, sometimes only becoming aware of the need for a British passport or Certificate of Entitlement at the airport when attempting to travel home.
The Home Office says the changes are designed to improve border security and streamline identification by making it clearer and faster to confirm who is entitled to enter the UK. However, critics have pointed to the lack of a transition period and how the new rules have been communicated, especially to citizens who have never previously needed British documentation to travel to the UK.
What This Means in Practice
British citizens with dual nationality who do not hold a British passport will now need to apply for either a current UK passport or a Certificate of Entitlement before travelling if they want to avoid refusal of boarding by carriers or refusal of entry at UK border control. Both documents serve as evidence of British citizenship rights and are essential under the new digital system.
For those who travel infrequently or live overseas, applying for a British passport or certificate in advance is now a non-negotiable requirement rather than a matter of convenience. The Certificate of Entitlement and associated documentation can take several weeks to process, so planning ahead is strongly advised.
Why This Matters
This is one of the most significant changes to how British citizenship is demonstrated at the border in recent years. It reflects the UK’s broader move towards digital permission systems and tighter integration of immigration controls with travel documentation. For British citizens, especially those with dual nationality who may have relied on a foreign passport, the practical effect is that they must now ensure they have the correct UK documentation in place before travelling or risk being prevented from boarding or entering the UK.
Need Help with a Certificate of Entitlement or UK Passport Application?
If you are affected by these new rules and need advice on applying for a Certificate of Entitlement or a British passport, professional assistance can make the process smoother and reduce the risk of delays or complications. For expert guidance on your application and how to navigate these changes in UK citizenship documentation, please contact one of our immigration advisers at Lisa’s Law Solicitors. We can assist with preparing your application, advising on the documents required and providing support every step of the way.
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