John Whelan: Airline bosses worry about the costs of air traffic control delays           

There have been direct calls for consolidation of the air-traffic control system 

Delays caused by air-traffic control across Europe cost €6bn, equivalent to 11.6 million tonnes of excess CO2 in 2019.

The heads of the European airline industry did not hold back at the 'Future of Aviation' conference in Brussels last week with their overriding message that there was urgent need to overhaul air traffic control across the continent. 

Direct calls for consolidation of the air-traffic control system were made among others by Willie Walsh, the director general of the business group, the International Air Transport Association, or IATA.