FR 677 then FR 554 at Dublin
Cardiff → Dublin → Manchester
Timetable, Dublin time
00:50FR 677 from Cardiff at the gate
18:35FR 554 to Manchester leaves the gate
17 h 45 apart on the timetable
FR 554 leaves 17 h 45 after FR 677 arrives on the timetable: more than half a day, so not a connection we count.