I was chatting with an EI pilot a while back and he was telling me that there are issues about the operation of high bypass engines in low atmospheric pressure. This is obviously something which can (no, really!) happen in Dublin.
Low atmospheric pressure brings rain (again, a great rarity in Dublin) and that brings about performance limitations, because of the runway length. This part I understand, but I'm not clear on whether there is specific issues relating to high bypass engines; i.e. why wouldn't this apply to any engine?
Hope I've made myself reasonably clear!