Yesterday's technical issue with air traffic control systems, which affected several UK airports, has been resolved.

But due to the significant delays that accompanied them, many flights at London Heathrow Airport are expected to be off schedule again today, reports Sky News.

Travellers flying to or from the airport are therefore advised to contact their airlines before travelling to the airport.

Delays may also occur for several days to come, according to the news website.

Source: Aftonbladet.se