More news on this day
Thousands of airline passengers travelling through Heathrow and other major UK airports are still dealing with disruption after an air traffic control systems failure led to around 2,000 flights being cancelled or delayed over two days, with regulators indicating that most travellers are unlikely to receive financial compensation.
Get the latest news straight to your inbox!
Air traffic control glitch triggers widespread flight cancellations
Published reports indicate that a technical failure at UK air traffic control provider NATS on Tuesday 8 September caused a four hour outage in its flight processing system, forcing severe restrictions on departures and arrivals across the country. The knock on impact continued into Wednesday 9 September, with aviation data firm Cirium cited in multiple outlets as estimating that more than 2,000 flights were affected over the two day period.
Heathrow, the UK’s busiest airport, emerged as the worst hit hub. Coverage of the disruption notes that the airport saw dozens of departures and arrivals cancelled or heavily delayed as airlines tried to recover schedules and reposition aircraft and crew. While operations have since stabilised, Heathrow’s own passenger advice pages continue to warn that some services may still be subject to short notice changes and that travellers should check the status of their flight before heading to the airport.
Airlines including British Airways and other major carriers have been rebooking passengers onto later flights, in some cases through alternative airports. Industry data and media reports describe aircraft operating at full capacity in the days following the outage, with limited spare seats making it harder to quickly clear the backlog of stranded travellers.
Transport coverage suggests that the incident is now the subject of scrutiny both from regulators and from government, with questions being raised about resilience in the UK’s air traffic control infrastructure and the ability of airports and airlines to communicate clearly with passengers during fast moving operational crises.
Why most passengers are ‘unlikely’ to receive compensation
The UK Civil Aviation Authority (CAA), which oversees passenger rights, has stated in its public guidance that disruption directly caused by the NATS outage is likely to be treated as the result of “extraordinary circumstances” under UK passenger rights legislation. According to the CAA’s published framework on compensation, airlines are not required to pay fixed sum cash compensation when cancellations or long delays are caused by events that are outside their control, such as air traffic control failures, certain security incidents, or airspace closures.
Travel industry reports highlight that this classification explains why passengers affected by this week’s cancellations are being told they are unlikely to receive cash compensation, even if they experienced long waits or missed onward connections. While some campaigners argue that the threshold for extraordinary circumstances is interpreted too broadly, the current rules give airlines strong grounds to reject compensation claims when the primary cause of disruption lies with external systems or authorities.
Separate CAA advice specific to Heathrow and other major airports reiterates that where flights are cancelled at the request of an airport or as a result of air traffic control restrictions, entitlement to compensation depends on the exact circumstances of each flight. In the case of the September NATS outage, multiple outlets report that the regulator’s initial view is that the incident falls firmly into the category that usually removes the duty to pay standard compensation.
The regulator’s broader consumer guidance notes that passengers may still seek to challenge an airline’s decision through the carrier’s complaints process, alternative dispute resolution schemes, or ultimately the courts. However, past cases involving major systems failures at airports suggest that such challenges are difficult to win when regulators have already indicated that an incident qualifies as extraordinary.
What airlines still have to provide when flights are disrupted
Although most travellers affected by this week’s Heathrow disruption are unlikely to receive a fixed compensation payment, UK law still places important obligations on airlines when flights are cancelled or heavily delayed. CAA materials on flight cancellations explain that passengers covered by UK passenger rights legislation must be offered a choice between a refund, rebooking at the earliest opportunity, or rebooking at a later date convenient to the traveller.
In practice, this means that passengers whose flights were cancelled because of the NATS issue can request a full refund if they no longer wish to travel, or ask to be placed on the next available service to their destination, including on another airline where necessary. Consumer guidance stresses that these rights apply regardless of whether the underlying cause of disruption is considered extraordinary.
Airlines also retain what is described as a duty of care. Official guidance for consumers sets out that, in the event of significant delays or overnight disruption, carriers are expected to provide meals and refreshments appropriate to the waiting time, hotel accommodation where an overnight stay becomes necessary, and transport between the airport and that accommodation. Where airlines are unable to arrange services directly during a large scale disruption, some passengers may be asked to pay for hotels and food themselves and later submit receipts for reimbursement.
However, the same guidance indicates that airlines are not usually required to cover so called consequential losses, such as missed events, prepaid accommodation at the destination, or luxury expenses. Published advice from the CAA and consumer bodies suggests that travellers should check their travel insurance policies for cover in these areas, as standard passenger rights may not extend to wider financial losses caused by delays.
Heathrow and regulators issue updated travel advice
Heathrow’s latest passenger information pages refer directly to the recent NATS technical issue and confirm that the airport is now operating as normal, although a small number of flights may still be rescheduled as airlines balance fleets and crews. The airport’s public guidance urges travellers to confirm their flight status with their airline before travelling and to arrive at the terminal only if their service is shown as operating.
The Civil Aviation Authority has also reiterated wider summer travel advice that remains relevant in the wake of the air traffic control outage. The regulator encourages passengers to monitor Foreign, Commonwealth and Development Office travel advisories, stay in close contact with their airline, and keep receipts for any reasonable expenses incurred when disruption occurs.
Consumer campaigners and travel commentators point out that the complexity of the rules and the distinction between compensation and duty of care can cause confusion. While many passengers may understandably expect a cash payout after spending long hours in crowded terminals, current regulations focus on ensuring that travellers are either refunded or eventually transported to their destination and that basic needs such as food and accommodation are met during the wait.
For now, the emphasis at Heathrow and other UK airports affected by the September disruption remains on restoring normal operations, clearing remaining backlogs, and reviewing how information is shared with travellers when large scale technical failures strike core parts of the aviation system.
What affected travellers can do next
Passenger rights information from the CAA suggests several practical steps for those caught up in this week’s flight chaos. Travellers are advised to first contact their airline to confirm whether their journey falls under UK passenger rights legislation and to clarify which options are available, such as rebooking or refunds. Keeping detailed records of boarding passes, booking confirmations, and any written communication with the airline can help if a dispute arises later.
Guidance further recommends that passengers retain itemised receipts for essential expenses like meals, non luxury accommodation, and local transport, as airlines may request evidence before reimbursing these costs. If an airline declines to cover reasonable expenses that appear to fall under its duty of care, travellers may be able to escalate the case to an approved alternative dispute resolution body or, in some circumstances, pursue a claim through the small claims courts.
Where standard compensation is not available because an incident is classed as extraordinary, some travellers may find that comprehensive travel insurance offers additional protection. Industry and consumer reports emphasise checking policy wording carefully, since cover for air traffic control failures, airport incidents, or airspace closures can vary significantly between insurers and products.
As investigations into the NATS outage continue, the episode is likely to renew debate over whether the current balance between airline liability, infrastructure resilience, and passenger protection remains appropriate in an era of ever busier skies and increasingly complex digital systems. For passengers passing through Heathrow in the immediate aftermath, the most important advice remains straightforward: verify your flight status before leaving home, understand your rights on refunds and rebooking, and keep every receipt.
Condé Nast Traveller: UK airport latest and compensation outlook
UK Civil Aviation Authority: cancellations and passenger rights