FR 6958 then FR 553 at Manchester
Killarney → Manchester → Dublin
Timetable, Manchester time
15:45FR 6958 from Killarney at the gate
08:35FR 553 to Dublin leaves the gate
16 h 50 apart on the timetable, overnight
FR 553 leaves 16 h 50 after FR 6958 arrives on the timetable: more than half a day, so not a connection we count.