Snow and bad vis at Heathrow - who decides what is cancelled?
When Heathrow has to clear runways or reduce the flow rate due to low visibility ops what is the process for deciding what is cancelled and what is given priority to operate? Is it simply decided by the airport operator or done in co-operation with the airlines or just the airlines making the decisions?
And are there any conventions that are followed when working out what is cancelled like for example domestic before international, departures before arrivals etc or different airlines being given priority?
Just curious to know how it really works when the system is under pressure, I mean it all seems rather arbitrary from the point of view of the passengers.