Britain’s busiest airports - Heathrow and Gatwick - were thrown into chaos on Friday, 24 September, when the UK Border Force’s e-gates stopped working.
A systems failure affected ports and airports across the country but the situation was at its worst at London’s two main international airports, Heathrow and Gatwick.
One passenger said on social media there was chaos at Heathrow with the space to queue fast running out.
Heathrow later tweeted: "Earlier today, a systems failure impacted the e-gates, which are staffed and operated by Border Force. This issue, which impacted a number of ports of entry, has since been resolved and the e-gates at Heathrow are back up and running again."
International passengers have faced months of delays as staff process the COVID-19 documentation required to travel.