25 Feb. 2026 /Mpelembe Media/ —  As of February 25, 2026, the UK has fully implemented strict pre-departure checks under the Electronic Travel Authorisation (ETA) scheme. Because British citizens are legally ineligible to apply for an ETA, dual nationals can no longer use their non-British passports to board flights, ferries, or trains bound for the UK.

When attempting to check in with a foreign passport, the airline’s system will flag the traveler as “not cleared to fly”. Facing fines of up to £10,000 per passenger for non-compliance, carriers are strictly denying boarding to individuals who lack valid proof of their Right of Abode.

To travel to the UK, dual citizens—including children born abroad—must now present one of the following: a valid British passport, an Irish passport, or a Certificate of Entitlement (CoE). The CoE, which costs £589, is transitioning to a digital eVisa format linked to a UKVI account. In limited circumstances, carriers may use their discretion to accept British passports that expired after 1989, or stranded travelers may need to apply for an Emergency Travel Document to return home.