Just a thought and one which I dont think has come up before. Cargo seems to be a very profitable business for Aer Lingus. The belly of an A330 can hold quite a lot. Why was there never a cause for dedicated freighter aircraft with EI?
Aer Lingus owned Aer Turas, which operated as a Freight/Cargo airline running a couple of DC-8's (hence the 1970's style EI shamrock on their tail). IIRC Aer Turas was closed down in the early 2000's.
I'm told that the length of the runway at Dublin is (was) a limiting factor for cargo on outbound legs, especially on the older 330-300's.
JAS