British Dual Citizens May Be Denied Boarding Without a British Passport
Friday, March 13, 2026
A major change to the United Kingdom’s border rules is now affecting British citizens living overseas, particularly those with dual nationality. Travel experts say that many British dual citizens may face unexpected travel disruptions if they attempt to enter the UK using only a foreign passport.
The change follows the full rollout of the UK’s Electronic Travel Authorisation (ETA) system on 25 February 2026, which requires airlines to digitally verify whether travellers have permission to enter the UK before boarding. Under the new system, British citizens cannot apply for an ETA, meaning dual nationals must prove their British status with the correct documentation before travel. Contd
According to current guidance, British dual citizens must travel to the UK with either -
• A valid British passport
• A Certificate of Entitlement to the Right of Abode attached to a foreign passport
Without one of these documents, airlines may refuse boarding for UK-bound flights.
Previously, many dual nationals were able to travel to the UK using a foreign passport alone, sometimes encountering extra checks at the border. However, the new ETA travel verification system now requires airlines to confirm travel permission before departure, effectively enforcing the requirement to present proof of British citizenship in advance.
Millions of Expats Potentially Affected
The rule change could impact millions of British citizens living abroad, including those who have not held a British passport for many years but still retain British citizenship through birth or descent.
Dual nationals who attempt to travel on a foreign passport alone may encounter problems at airline check-in, including the risk of being refused boarding until their British citizenship can be verified.
Complete Guide for Dual Citizens
To help travellers understand the new rules, international passport advisory service has published a detailed guide explaining the changes and what British dual citizens should do before travelling.
The guide answers common questions including -
• Can a British citizen travel to the UK with a foreign passport?
• Do British citizens need an ETA?
• What documents are required to enter the UK in 2026?
• What options exist if a British passport has expired?
