July 16, 2010 - 11:35pm

The total closure of European skies in April because of the volcanic ash cloud was considered by many observers to be an unnecessarily severe reaction. More than 100,000 flights were cancelled and, according to the Association of European Airlines, the airlines clocked up losses of at least $1 billion.

May 4, 2007 - 9:34am

The Single European Sky (SES), officially launched in 2004, is the single biggest air traffic management (ATM) initiative ever undertaken in Europe. Its main aim is to provide wholesale structural reform of a deeply fragmented regulatory framework to provide a seamless ATM system.