The volcanic ash cloud over Europe has caused an aviation upset on a scale never seen before. Even the September 2001 attack on the World Trade Centre and Pentagon did not create such an extensive interruption to air transport services.
Icelandic authorities have warned Europe that more volcanic eruptions are forecast over the next 20 years. David Learmount talks about what has made this event unique, and what the aviation world needs to do to be prepared for the next similar occurrence.
Flightglobal keeps you up to date with all the latest news, information and images on the ash cloud which has had such a dramatic effect on European Airspace.