Even as a UK national, traveling on your other passport (US, Canadian, etc.) now requires you to physically show your valid British or Irish passport at check-in. Airlines must enforce this under the new “no ETA, no travel” system. Without the right document, you could be stopped from boarding your flight home. Renew your UK/Irish passport now to avoid being stranded.

Starting from 2 April 2025, European travelers will need to apply for a UK ETA (Electronic Travel Authorisation) before entering the UK.