The Eyjafjallajökull volcano is still erupting, and possibly intensifying, with the ash plume rising to 30,000 feet. Evidence of ash dust over the UK is being detected by Met Office observations and there are reports of dust reaching the ground. The Met Office commissioned NERC (National Environment Research Council) research flight flew over the North Sea on Friday afternoon (16th April) and detected three distinct layers of ash, from fine particles at low levels to large particles around 8,000 feet.