Ireland Minus R plus C Equals Iceland

Breaking away from the dreary but important task of finding any useful information about Ireland I mistyped Ireland and instead saw suggestions about Iceland..

Once again the Lolcano in Iceland has chucked its muck into the atmosphere and flights to and from Ireland have been disrupted.  Financial pages on the Times commented that the ash deposit accounts for another crippling impact on Ireland's airline industy's financial investments and calls for another research plance to check the air quality have benn made.

The research plane hasn't come back yet - it's got lost in a sinister cloud of deadly gas and ash.......

Prior to the first closure of airspace there had been an aviation industry global wide acceptance of zero tolerance of volcanic ash by the engine manufacturers.

Then there was talk of a 'minimum level' of volcanic ash tolerance. But what is that minumum?

Unless I have missed something in the media already, there has been little said by the engine manufacturers in public as to level of ash can be tolerated. Or is this an unknown factor?

Passengers due to fly today and now cancelled are inconvenienced but on balance are happy the authorities are putting safety first.