Roy Hudd et al,
maybe the reason the naysayers have gone quiet is because there is nothing to add at this moment. The reason airspace is becoming available is becasue the Ash Charts, produced every 6 hours, show a reduction in the extent and coverage of the ash cloud.
A reduction that is totally in line with the fact that scientists have been saying over the past two days that the intensity and frequency of eruptions has been falling.
The return of airspace has nothng whatsoever to do with the publicity stunt flight by BA which has as much scientific credential as a Loreal shampoo advert.