One interesting tidbit that I forgot about... Heathrow is heavily slot controlled. The options the airport is giving airlines is: 1) Cancel flights 2) Operate

One interesting tidbit that I forgot about... Heathrow is heavily slot controlled. The options the airport is giving airlines is: 1) Cancel flights 2) Operate with lower loads on the existing flights #1 is the best option as it reduces the number of staff needed on the ground and in the air but airlines are likely going to go with #2 because they don't want to risk this edict from the airport going on long enough to threaten their slots. And regulators are not budging. They actually come out and said that any slots not used, even for capacity reasons, will be returned and are not exempt.