Brian->The Manchester flights start in March and as the first of Aer Lingus' new airbuses doesn't arrive until June, it would never have been operated in its current format by a based aircraft.
The currently announced EI expansion only requires a single aircraft to start operations in Dublin on the first weekend in June, so there is probably more to be announced. I doubt we'll see a fifth airbus in Cork, but perhaps we'll see another W pattern out of Dublin (Glasgow?).