FR 6839 then FR 555 at Manchester
Prague → Manchester → Dublin
Timetable, Manchester time
17:25FR 6839 from Prague at the gate
15:20FR 555 to Dublin leaves the gate
21 h 55 apart on the timetable, overnight
FR 555 leaves 21 h 55 after FR 6839 arrives on the timetable: more than half a day, so not a connection we count.