O'Leary is spouting on Sky news!! Having flown the test aircraft all over Scotland at 41 000 ft spouting that there is no ash, 'been in the red zone - no ash, blah, blah! The charts don't show ash at 41k it is all down at surface to 20k. O'Leary is a t!t.
Not sure if you've ever been in a plane but in order to get to 41,000ft it has to climb from the airport altitude (in this case Prestwick which is currently "out of bounds" to passenger flights according to IAA) and then come back down through all the flight levels to land again. If no ash was found in the air or on the aircraft then there is no ash at any level in the excluded zone.