re the runway, I'm not sure we're referring to the same thing, They are building a terminal at DA, not a runway.
They are actually building a new runway at Dublin in addition to the new terminal...
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.... but you're right, the Lusk Airport thing is a different kettle of fish altogether. It's a green-field, brand-spanking-new airport proposal to be sited about 10 miles north of the existing airport.
It's such a ridiculous suggestion that it'll probably happen.... only in Ireland!!!