Travel Challenges for British Dual Nationals

Nevertheless, there are occasions when someone who has recently become a British citizen must travel urgently, without having first obtained a British passport. In the past, if these individuals were non-visa nationals, they could simply enter the UK using the passport from their other nationality.

This has now changed significantly and some dual nationals may have trouble returning to the UK without a British passport. 

With the transition to a digital immigration system, including Electronic Travel Authorisation (ETA) and mandatory pre-departure checks for all travellers to the UK, it has become more difficult for dual nationals from non-visa countries to use their foreign passport for UK entry. As a result, British dual nationals may encounter problems when returning to the UK without a British passport and may be denied boarding. 

Transport carriers are required to verify each passenger’s status before departure, as they risk penalties for transporting passengers who do not have adequate documents for entry into the UK. Due to the enhanced traveller screening procedures and mandatory checks, individuals unable to provide satisfactory proof of their eligibility to enter the UK will be refused boarding.

To enter the UK, travellers must demonstrate their entitlement to live or work in the country without any immigration restrictions or present a visa that grants them such rights. Those who are not British citizens need to provide proof of their permission, such as an eVisa, or an ETA (for non-visa nationals). An exception is made for Irish citizens, who are permitted to travel to the UK using a valid Irish passport alone.

British citizens, including those holding dual nationality, are exempt from the permission to travel requirement, however they must be able to evidence they are British citizens. They cannot apply for an ETA or a visa owing to their British nationality and will need to present either a valid British passport or a certificate of entitlement.

Since 25 February 2026, the Home Office has enforced this requirement. All British dual nationals must ensure they possess a valid UK or Irish passport, or a certificate of entitlement, if they intend to travel to the UK on or after this date. Failure to do so may result in being unable to board their transport to the UK. These individuals may be able to apply for a British passport while outside the UK, but that is likely to take longer than applying in country and will delay their return. 

British dual nationals should therefore review their travel documentation carefully before making any arrangements to travel. Those who have recently naturalised should take prompt steps to apply for a British passport before planning any travel, to avoid disruption, delays, or being prevented from returning to the UK.

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