FR 6839 then FR 1957 at Manchester
Prague → Manchester → Dublin
Timetable, Manchester time
12:00FR 6839 from Prague at the gate
09:00FR 1957 to Dublin leaves the gate
21 h apart on the timetable, overnight
FR 1957 leaves 21 h after FR 6839 arrives on the timetable: more than half a day, so not a connection we count.