Bruce Wayne asked
Was it? is that why the UK airspace is closed because they have found ash contaminant in the atmosphere?
Is it that simple ?
The aircraft that have been operating VFR don't seem to have encountered it to a level that has been detrimental to flight.
If the UK airspace has been closed due to contaminants, at what concentration are those levels and where and at what levels ?
Please, do tell.. the UK avaition industry would appreciate you imparting that knowledge, perhaps NATS too.
The first 12 minutes or so of
Bang Goes The Theory are about the impact of the volcano of flights. There's a bit on the plane they kitted out to do the measurements, and a comment about how the levels in the cloud are really quite high.