Australia’s Smartraveller unit has issued an advisory urging dual Australian-British (and Australian-Irish) citizens to ensure they have the correct travel documentation ahead of changes to the United Kingdom’s entry rules that take effect on 25 February 2026. Under updated Home Office guidance, airlines and carriers will be legally required to confirm that dual nationals possess valid proof of their right to enter the UK before boarding, raising the risk of denied boarding for those without the appropriate passports.

Under the new regime, most non-visa-national visitors to the UK must obtain an Electronic Travel Authorisation (ETA) before travel as part of the government’s “no permission, no travel” system.

British and Irish citizens, including those with dual citizenship, are exempt from the ETA requirement, but only if they use a valid British or Irish passport or hold a Certificate of Entitlement in another passport that confirms their right of abode.

From 25 February 2026 onwards, travellers who hold dual nationality but attempt to enter the UK on an Australian passport alone — without a valid UK or Irish passport or certificate — risk being refused boarding by airlines that are required to verify travel entitlement in advance.

Smartraveller’s warning highlights that the ETA system has been in a phased rollout but will be strictly enforced from late February.

Dual UK-Australian citizens are therefore advised to renew or secure the correct travel document well ahead of trips to avoid disruption.

A Certificate of Entitlement, which is placed in an Australian passport to demonstrate the right of abode, remains an alternative for those without a current British or Irish passport, though it generally costs more and must be aligned with the passport used for travel.

The advisory reflects broader efforts by UK authorities to tighten border security and modernise travel checks through digital authorisation and clearer proof of citizenship for dual nationals.

Travel industry sources and affected families in Australia have reported confusion and concern among dual citizens, particularly those who previously relied on their Australian passport when travelling to the UK. Many are now scrambling to renew British documentation or obtain certificates before the 25 February deadline, while others face potential itinerary cancellations or complications at airline check-in if they fail to present the correct document.

Smartraveller’s alert underscores the importance of checking documentation requirements thoroughly before booking flights and ensuring all travel permissions are acquired well in advance of departure to the United Kingdom.