The exact same trip:
Look Out! It's Aer Lingus! LGW-DUB-BOS 30MAR
Similar:
https://www.flyertalk.com/forum/trip...eeekonomy.html
As you have no checked luggage, I think it should be fine unless you are very unlucky and the LGW-DUB plane goes tech after you have boarded
If you see that the flight is going to be delayed in the morning, there may be enough time to make your way to LCY and go from there instead