More than one million British dual nationals are being urged to check their travel documents ahead of new UK border requirements coming into force on 25 February.
Under the updated rules, anyone holding British citizenship alongside another nationality will be required to travel with a valid UK passport or obtain a £589 certificate of entitlement to prove their right of entry.
The changes are linked to the rollout of the UK’s Electronic Travel Authorisation (ETA) system, part of the government’s wider move towards digitised border controls.
While British and Irish citizens remain exempt from requiring an ETA, airlines and other carriers will be required to verify a traveller’s right to enter the UK before departure.
This means dual nationals must either present a valid British passport or hold a certificate of entitlement confirming their right of abode in the UK. Without one of these, carriers may refuse boarding or delay travel while eligibility is checked.
Previously, many dual nationals were able to enter the UK using their non-UK passport without charge. From 25 February, that will no longer be sufficient.
The policy forms part of the Home Office’s transition to a “streamlined, digital immigration system”, aligning the UK with countries that already operate pre-travel screening regimes.
For corporate travel managers and frequent flyers, the changes introduce a potential point of friction, particularly for executives who hold dual nationality but do not routinely travel on a British passport.
With the effective date imminent, there are concerns that travellers with upcoming trips may be caught out, especially those whose British passport has expired or who have never applied for one despite holding citizenship.
The £589 certificate of entitlement provides an alternative proof of right of entry but represents a significant cost — and processing times may not accommodate last-minute travel.
For managed travel programmes, this may require updated traveller communication and documentation checks ahead of UK-bound journeys. Corporate travel buyers should also consider potential disruption risks where key personnel rely on non-UK passports for international mobility.
The Home Office maintains that public guidance on the changes has been available since last year and that the policy ensures clarity for carriers under the new ETA regime.
Officials argue that the reform strengthens border security while modernising entry processes.
However, with implementation just days away, dual nationals are being advised to review their documentation immediately to avoid denied boarding, delays or unexpected costs.
For the UK’s globally mobile workforce, particularly in sectors such as finance, law, consulting and aviation, the new rules underline a broader trend: greater scrutiny at borders and increased reliance on pre-travel digital verification.
As the ETA system beds in, ensuring correct documentation before departure will become not just best practice, but essential.