Recently flew on Aer Lingus from DUB to LHR on a BA code share. First thing while waiting in line to check my bags they called every one forward that was flying to LHR. Our flight was at 8pm and they asked if we minded being put on the 6pm flight that was running behind but would leave by 7. We had no problem with it.

Since it had the BA code share we went to the lounge and showed my wifes BA silver card and were in. Very nice lounge that had plenty of beer wine and alcohol.

The one thing I would really compliment them on is there restrooms, which when compared to the ones at T-5 would be like comparing a 5 star hotel to a 1 star.

Every flight between LHR and DUB on this airline appear to be a BA code share.