Airports in the UK have suffered from a computer glitch that froze Border Force machines, caused queues and meant staff had to use manual alternatives.
Airports including Heathrow, Luton, Birmingham, and Gatwick admitted to problems and told their passengers that they should expect delays in the passport-scanning and facial-recognition process. Heathrow and Luton both tweeted messages that border force computers were at fault, which the UK Home Office confirmed.
The official Heathrow account said: "Due to a nationwide Border Force IT issue, there are delays for arriving passengers across the airport. UK Border Force IT issue is creating delays for arriving non-EU passengers. Extra staff are on hand."
Luton and Gatwick both echoed this, repeating the issue with the Border Force machines, and adding that it was affecting most major airports.
@joshbone Border Force doing what it can to get you all through. National systems failure causing delays for most uk airports tonight.— London Luton Airport (@LDNLutonAirport) April 30, 2014
Following difficulties with @ukhomeoffice IT systems across the UK there have been longer than usual queues at immigration.— Gatwick Airport LGW (@Gatwick_Airport) May 1, 2014
On Thursday the Home Office told V3 that the issue had been fixed and that travellers can expect to find working systems.
Immigration and security minister James Brokenshire said: "Our engineers have been working through the night to fix the temporary IT problems that regrettably led to longer queues for some passengers at passport controls yesterday.
"The current situation is much improved and we are doing our best to keep waiting times to a minimum during this morning's busy period. We apologise for any delays but security must remain our priority at all times."
The airports also say that the situation has improved and they are no longer advising customers of potential delays.
Cotton seedling freezes to death as Chang'e-4 shuts down for the Moon's 14-day lunar night
Fortnite easily out-earns PUBG, Assassin's Creed Odyssey and Red Dead Redemption 2 in 2018
Meteor showers as a service will be visible for about 100 kilometres in all directions
Saturn's rings only formed in the past 100 million years, suggests analysis of Cassini space probe data
New findings contradict conventional belief that Saturn's rings were formed along with the planet about 4.5 billion years ago