FR 3976 then FR 556 at Dublin
Barcelona → Dublin → Manchester
Timetable, Dublin time
19:00FR 3976 from Barcelona at the gate
07:40FR 556 to Manchester leaves the gate
12 h 40 apart on the timetable, overnight
FR 556 leaves 12 h 40 after FR 3976 arrives on the timetable: more than half a day, so not a connection we count.