BA 1378 then FR 561 at Manchester
London Heathrow → Manchester → Dublin
Timetable, Manchester time
19:05BA 1378 from London Heathrow at the gate
12:00FR 561 to Dublin leaves the gate
16 h 55 apart on the timetable, overnight
FR 561 leaves 16 h 55 after BA 1378 arrives on the timetable: more than half a day, so not a connection we count.