Originally Posted by
eyeballer
He means next time you book, if you book a BA operated flight from LHR to DUB it will likely leave from T5 so you would have access to the Galleries lounges airside. For this trip you booked a BA codeshare flight operated by Aer Lingus so leaves out of T2 hence the need to do the terminal change.
Better again would be to book SFO to DUB nonstop on Aer Lingus rather than try to negotiate LHR.