As of February 25, 2026, the United Kingdom has fully implemented its digital border system, meaning your entry requirements now depend heavily on your nationality. Most "non-visa" nationals—including citizens of the United States, Canada, Australia, and many EU countries—are now legally required to obtain an Electronic Travel Authorisation (ETA) before they can even board a flight to the UK. The ETA costs £16, is digitally linked to your passport, and is valid for two years or until your passport expires. In addition to the ETA, you must present a valid passport; physical ID cards from EU/EEA countries are no longer accepted. For British and Irish citizens, including dual nationals, a valid British or Irish passport is the gold standard for entry, as they are exempt from the ETA scheme. If you are a national of a country that requires a standard visa (such as India or China), you must still apply for and receive your physical or eVisa before travel. It is a supportive peer tip to apply for your ETA at least three working days in advance to ensure your digital permission is ready for the "no permission, no travel" checks at the gate.