The Ach Cloud has nothing to do with it all airlines in Europe had to cancel flights.
If the aircraft diverted it was for a good reason and mabye it couldn't depart for the destination it was due to go for the same reasons it had to divert in the first place.
I sure EZY done the same thing. THe Ash Cloud was totaly different and why are there 23 flights cancelled today when there is no Ash Cloud???