What are my rights if my flight from Gatwick is cancelled?
As long as the drone problem is not deemed a terrorism incident, passengers should be able to claim for some losses
Can I claim compensation from my airline?
All airlines are required to offer a refund, a promise to put the passenger on the next available flight or alternative routing. But, as most flights are extremely heavily booked at this time of the year, travellers may find that the next flight available is several days away. Compensation is not payable in this instance because the drone situation will be deemed to be beyond the airline’s control.
Source: Guardian Transport