Aerlingus' operation in Cork is back at 2005 levels. They quietly closed Gatwick and Rome this Summer and have also withdrawn from Berlin, Warsaw, Prague and Madrid in the last few years while franchising out Birmingham and Manchester to EI regional.
Their bucket and Spade strategy has worked for them but has produced little or no growth at the airport as many of the Charter flights have ceased as a result.
In contrast Ryanair's growth at Cork since 2010 has been spectacular although as Jamie says most of it has been head to head competition with Aerlingus and Wizzair. It'll be interesting to see what tneir next move will be particularly as they're paying premium charges for most of their routes.
Maybe they've concluded that Cork is where the population is in the South of the Country and that trying to play it off against Shannon or Kerry just isn't worth the hassle!