Gatwick Airport launches legal action after ministers relax runway slot rules

Gatwick Airport has launched legal action against the UK government over its decision to relax airline slot-use rules, escalating a dispute about how far ministers can go to protect schedules during disruption fears.

The airport has filed for judicial review over the temporary change, which lowers the usual slot-usage threshold from eight out of every 10 take-off slots to seven out of 10 when the industry faces jet fuel shortages. The measure is due to take effect on Friday, June 19, 2026.

The case gives Gatwick a route to argue that ministers moved too quickly and that the original rules should have remained in place. It also raises the possibility that the new regime could be suspended while the court considers the challenge.

Why ministers changed the rules

The government announced the relaxation in May 2026, saying it wanted to prepare for possible disruption linked to jet fuel supply concerns. Officials said the change was meant to give airlines more flexibility and help avoid last-minute cancellations.

According to the Department for Transport, the policy was designed in advance so protections and mitigations would already be in place by the time the summer travel period gathered pace. The government has framed the move as a passenger-protection measure rather than a permanent rewrite of slot policy.

Slot rights are valuable because they shape airline schedules, capacity and, in some cases, market value. Under the normal system, carriers risk losing slots if they do not use enough of them, which is why changes to the rules can have immediate commercial consequences.

Gatwick's objections

Gatwick argues that the existing slot rules were sufficient if they were properly enforced. It also says the consultation on the easing lasted only four days, which it says was too short for a change with such significant implications.

The airport's legal challenge is aimed at both the substance of the policy and the process used to introduce it. That means the court may be asked to examine not only whether ministers were entitled to relax the rules, but also whether the consultation and timing were lawful.

The dispute sits against wider concerns about summer travel reliability and how much flexibility airlines need if fuel supply is disrupted. For carriers, the change could affect how carefully they manage schedules if they think they might not meet the usual usage threshold.

The case may also become a precedent for future disputes over airport slot allocation, especially if governments try to alter the rules in response to emergencies. Aviation groups and operators will be watching closely because the outcome could shape expectations around notice, consultation and intervention.

A judge will now decide whether to accept the complaint and whether to freeze the rule change while the review is considered. Further detail may emerge if Gatwick's filing is published, and more reaction from the government and industry is likely if the case is admitted.