FR 6839 then FR 7546 at Manchester
Prague → Manchester → Poznan
Timetable, Manchester time
11:30FR 6839 from Prague at the gate
06:45FR 7546 to Poznan leaves the gate
19 h 15 apart on the timetable, overnight
FR 7546 leaves 19 h 15 after FR 6839 arrives on the timetable: more than half a day, so not a connection we count.