Nick Bernard, Queen Mary University London analysis the impact of the volcanic ash crisis on EU air passenger rights and discusses some unresolved issues. He addresses inter alia questions of allocation of costs beyond airlines and passengers as well as enforcement problems of the regulation from a consumer law perspective. 1st HEC workshop on regulation. Emergency regulation under the thread of a catastrophe: a hard look at the volcanic ash crisis. A conference organised by Alberto Alemanno, HEC Paris. 10 & 11 november 2010. More info at http://www.albertoalemanno.eu