Neidin, not so sure about Irish people having no loyalty. Aer Lingus especially certainly do have quite a following from Cork people for their London services. Ever up at ORK when the EI A321 comes or goes from Heathrow? The Liberty Stream Balcony always jammed with relations and friends from my experience waiting for the passengers. Never quite the same sense of drama when the Ryanairs come and go to Stansted! There is still a thing in the popular Cork psyche for Aer Lingus which is now being reinforced more by their starting many newer routes over the course of last year and again later this year. On the other hand Ryanair have had little time for Cork down the years, a fact not lost on Cork people!
Don't see easyJet blinking any time soon with all the other London flights from Cork which has a funny ability to absorb as many London area flights as you throw at the place!