Originally Posted by Stevek
I initially heard it was just some flights from B but recently I've heard it'll be more substantial.
Whoever told you that is talkin out of their arse. Aer Lingus have been using Pier B regularly since T2 opened, as there are not always enough gates on Pier E, but check-in etc. is always done from T2 regardless.
There's no difference in charges between T1 and T2, so there's no reason why Aer Lingus would switch from T2 to T1.