Just as I was beginning to suspect, the entire Ash Cloud episode has been nothing more than an over-zealous health and safety spat by bureaucratic regulators gold-plating contrived rules based upon computer models bearing little linkage to reality.
So, just like anthropogenic global warming then.
Oh well, it's only the convenience and livelihoods of millions of people trashed on the back-burner. And at least the British government had consular staff on-hand at airports to advise people to turn around and go back to their hotels, in case they were incapable of working that out for themselves.
This, after all, is what we pay our taxes for.