FR 554 then FR 6596 at Manchester
Dublin → Manchester → Barcelona
Timetable, Manchester time
21:10FR 554 from Dublin at the gate
09:50FR 6596 to Barcelona leaves the gate
12 h 40 apart on the timetable, overnight
FR 6596 leaves 12 h 40 after FR 554 arrives on the timetable: more than half a day, so not a connection we count.