Ryanair and Shannon
It's still a mystery how the DAA allowed Shannon do that deal with Ryanair.
Yields needed to be very low to attract traffic from outside the mid west.
Both Ryanair and Easy Jet came close to negotiating a somewhat less radical deal with Cork in late 2004 but it didn't materialise.
Cork prefered to have a portfolio of airlines rather than allow one dominant carrier emerge and so far they have stuck to that strategy.