Originally Posted by sjm0028

I travel to London from BOS through DUB often. Passing through DUB T2 is easy. You follow signs "connecting passengers". First you show your boarding pass then go through quick easy emigration. You go through shopping area and then go down to the
T2 "The Lounge" that is good. It is near the EI LHR flight gates. Going through DUB is much easier than through LHR with long lines and lots of questions. Returning to the US though DUB is also low hassle because you pass through emigration at DUB.
I do not know what will happen with Brexit, but sometimes London flights have you take a bus to a separate area and then board the flight from there.