As a result of aviation stoppage I am no longer a paid worker. However I wont fall victim to fear and greed by trying to justify my plane into the air until proper investigative work has been done given the experience of the likes of the Finnish air force and unknown long/ medium term effects. Theoretically there is so much that can go wrong its not funny and certainly not worth letting the health of the industry dictate , thats akin to saying its too expensive to replace asbestos in terms of human health. KLMs few orbits at altitude prove nothing since they are unable to verify if they are flying through anything dangerous and besides what is the difference between 30 minutes of exposure and 4 hours? The notion that in Ireland and the UK the density in PPM is decreasing would only be true if the volcano had stopped spewing ash into the atmosphere which it has not. As for Brown being responsible , get a grip the first closure was not in the UK.