Travelers planning to visit the U.K. are facing significant disruptions due to a system outage for electronic travel authorizations (ETAs). Those from the U.S., Canada, and most European nations are being turned away from transportation hubs because they can't secure the necessary ETAs. This glitch highlights the importance of robust digital systems for international travel and raises concerns about potential future disruptions that could impact global travel plans. For the latest updates, it's best to check official U.K. government travel websites.