Heathrow back online after chaos at all UK airports after e-gates failed overnight.
It left thousands of passengers queueing at UK airports while the issue was being investigated and has now been resolved, the Home Office has said while ruling out a cyber-attack as a cause.
But be prepared for major delay if you are travelling today, and expect delays as staff get through the backlog.
If you have been impacted by flight delays, you may be able to seek compensation.
Passengers stranded on planes and suffering panic attacks
British Airways IT allocation failure leaves passengers stranded on planes and suffering panic attacks while those in Terminal 5 say there are now delayed for another 2 hours of delays collecting luggage and some planes have left without bags
Airports have however said passengers should expect to travel smoothly again on Wednesday after widespread delays on Tuesday evening owing to a nationwide technical outage affecting UK Border Force e-gates.
They have denied a cyber attack but internal staff at heathrow have suggested it is still being investigated.
Heathrow back online after chaos at all UK airports
Heathrow, Gatwick, Stansted, Edinburgh, Birmingham, Manchester and Bristol airports all confirmed problems with passengers being processed through the border on Tuesday.
Border officials were left to manually process all travellers instead. Pictures shared on social media showed long queues forming at passport control at several airports.
There are 270 automated gates in total at 15 air and rail ports in the UK, using facial recognition to allow people to enter the country.
Passengers were already facing disrupted journeys to and from airports owing to industrial action affecting train services across the UK throughout this week until Saturday.
