Some travelers applying to enter Britain in recent days have hit a
roadblock: The online system is down, and without digital permission
they can’t board planes, trains or boats bound for the U.K.The electronic travel authorization, called ETA, is linked to a
traveler’s passport. As of Wednesday afternoon, the app displayed a
message saying, “Sorry, the system is busy,” and directed users to try
again later. People attempting to apply on the website were also out
of luck. A digital queue, which advertised a wait of more than an
hour, stalled. Before the outage, the approval process was generally
swift, in some cases taking only minutes, though applicants are told
to allow at least three days for processing. The Home Office said it
was meeting that standard.But some travelers wait until the day of their departure to apply for
the authorization — and in recent days some of them have been
stranded. The Home Office did not respond to questions about when the
outage began or when it may be resolved. On Wednesday afternoon, some
passengers received notices that they had been approved.
From the NYTimes https://www.nytimes.com/2026/06/03/travel/uk-travelers-eta-outage.html (may be behind paywall)