FR 556 then BA 1373 at Manchester
Dublin → Manchester → London Heathrow
Timetable, Manchester time
17:25FR 556 from Dublin at the gate
17:20BA 1373 to London Heathrow leaves the gate
23 h 55 apart on the timetable, overnight
BA 1373 leaves 23 h 55 after FR 556 arrives on the timetable: more than half a day, so not a connection we count.