"Satellite imagery is showing a plume currently between 20 and 35 thousand feet over the near continent and extending westwards into southern UK and the English Channel. Evidence of thin plumes of volcanic ash were detected last night and during today across the UK, mainly at around six thousand feet. Also, there have been unconfirmed reports of slight ash deposits in places. With continuing eruptions from the volcano, we will continue to monitor the situation overnight. Issued at 1828 on Fri 16 Apr 2010. "
from the met office.
6000 feet, getting closer to ground level then!...