We won't be getting the data because NATS, have completed their Pavlovian "Volcanic ash means we must close all airspace just like in the simulator" response, have retired for a cup of coffee and a congratulatory slap on the back. Only now are they realising how dreadfully exposed they are in having no idea whatsoever as to what would be considered 'safe' levels of ash which allow them to reopen the airspace.