Passengers have been advised to check the latest flight information with their airlines.
Here, the Press Association answers 11 key questions on assistance and compensation.
– What flights are covered by UK consumer law?
Flights operated by an airline departing from a UK airport, flights operated by a UK or EU airline arriving at a UK airport, or flights operated by a UK airline arriving at an EU airport.
The air traffic control service @NATS is experiencing a technical issue which is impacting departing flights at UK airports.
Arriving flights are not currently impacted.
We are supporting our local NATS team in their efforts to resolve the issue as quickly as possible. We… pic.twitter.com/0s5pu4ODM5
— Heathrow Airport (@HeathrowAirport) September 8, 2026
– How long must a flight be delayed before I am entitled to assistance?
It depends on the distance of the flight.
For flights under 1,500km (932 miles) such as from Glasgow to Amsterdam: at least two hours.
For flights between 1,500km (932 miles) and 3,500km (2,175 miles) such as from Manchester to Marrakesh: at least three hours.
For flights over 3,500km (2,175 miles) such as from Heathrow to New York: at least four hours.
– What should this assistance include?
A reasonable amount of food and drink (often via vouchers), a means for you to communicate (often by refunding the cost of phone calls) and accommodation and transfers if an overnight stay is required.
– What happens in reality?
Airlines often fail to provide this assistance during major disruption because of being overwhelmed by requests and a shortage of available rooms in local hotels.
In this scenario, the Civil Aviation Authority (CAA) says passengers can organise their own assistance and claim the costs back from the airline by submitting receipts.
– Does that mean I should book a luxury hotel suite and order champagne?
Airlines are unlikely to reimburse you for that. The CAA advises passengers not to 'spend more than is reasonable'.
– How long must assistance be provided?
Until your flight takes off or you accept a refund after deciding not to travel. Any assistance provided depends on the length of the flight (Gareth Fuller/PA)
– What about getting to my destination?
If a flight is cancelled, airlines are required to get you to your destination if you still want to travel.
Most will book you onto another of their flights, but you may be entitled to travel with another airline or by an alternative mode of transport if it will get you to your destination significantly sooner.
Passengers doing this are often required to purchase their own tickets and submit a claim to their original airline for reimbursement.
– What if I no longer want to travel?
You are entitled to a refund if you have been delayed by more than five hours.
– Am I entitled to compensation for a delayed flight?
Airlines may be liable for compensation if the reason for a delay is deemed within their control, such as a fault with the aircraft or pilot sickness.
Causes of disruption classed as outside their control include severe weather, air traffic control control restrictions and security alerts.
In the case of Tuesday's disruptions, passengers are unlikely to be owed compensation as the technical issue is considered an 'extraordinary circumstance' and out of the airline's control.
– What if my flight is cancelled?
You are entitled to a refund or a replacement flight, and the same assistance as if your flight was delayed.
– Can I claim compensation if my flight is cancelled?
You can if the reason is deemed within the airline's control, you received no more than 14 days' notice and depending on the timings of a new flight offered.
Again, Tuesday's events are unlikely to fall within this category.
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