The recent volcanic activity in Iceland has resulted in high levels of volcanic ash in the higher atmosphere over many parts of Europe. The prevailing weather has pushed dangerous amounts of it over the UK. Flights over Scotland have been grounded since this morning and now the aviation authorities have called for an end to all air traffic (except emergencies) for 6 hours in UK airspace from midday until 18:00 (BST) today.
One of the fligfhts impacted has been Dr Ed Mitchell’s from the US. He should be in the UK now but is not. Thus the program for today has been cancelled. Volcanism and weather are highly unpredictable. I hope to get an update later today regarding the program for tomorrow.