The United Kingdom has clarified and tightened guidance affecting British dual nationals, reinforcing long-standing legal requirements that British citizens must use a UK passport when entering or leaving the country.

Updated travel guidance issued by the Home Office states that individuals who hold British citizenship, even if they also possess another nationality, are expected to present a valid British passport when travelling to the UK. While the legal obligation for British citizens to identify themselves as such at the border has existed for years, officials say recent updates aim to remove ambiguity and ensure consistent enforcement.

The change follows growing confusion among dual nationals who have sought to travel to the UK using a foreign passport, particularly in light of expanded electronic travel authorisation systems being rolled out for non-British visitors.

Under the revised framework, British citizens are not eligible to apply for such electronic travel permissions.

As a result, dual nationals attempting to travel on a non-UK passport may face delays, additional checks or denial of boarding if carriers cannot verify their status.

Authorities emphasise that the policy does not affect an individual’s right to hold dual nationality.

The United Kingdom continues to recognise multiple citizenships.

However, officials stress that British citizens must comply with domestic passport regulations when crossing UK borders.

Airlines and ferry operators have been advised to ensure documentation checks reflect the updated guidance.

Travellers who have allowed their UK passports to lapse are being encouraged to renew them well in advance of travel to avoid disruption.

Immigration lawyers note that while the clarification may inconvenience some dual nationals, it is largely procedural and designed to streamline border processing as digital authorisation systems expand.

The Home Office has indicated that further public information campaigns will accompany the broader rollout of electronic travel systems in the coming months.

The revised guidance underscores the government’s intention to maintain clear differentiation between British citizens and foreign nationals within the UK’s evolving border control framework.