They're also competing with them on Cork La Rochelle this Summer. To put this in perspective there is only one carrier serving La Rochelle from the entire London area.
Well to be fair, Aer Arann have operated Cork to La Rochelle since 2008, and they already had the route on sale for 2010 when Ryanair suddenly announced that they were going to announce it as well. There are loads of other airports in France which Ryanair operate to which don't have services to Cork, the only reason they chose La Rochelle was to annoy Aer Arann!