Only problem with Irish airlines, in particular the large blue and yellow one is that they may still require you to have the ability to live and work in the EU (not just Ireland), which now rules out UK Citizens. Even UK citizens that were previously resident in an EU country eg Spain or Italy, don't have the right to live and work in the EU now, just that one country.
This whole thing will really need to be sorted out but can't see it being done any time soon until emotions have calmed down and cooler heads can prevail.