FR 554 then BA 1367 at Manchester
Dublin → Manchester → London Heathrow
Timetable, Manchester time
21:10FR 554 from Dublin at the gate
12:10BA 1367 to London Heathrow leaves the gate
15 h apart on the timetable, overnight
BA 1367 leaves 15 h after FR 554 arrives on the timetable: more than half a day, so not a connection we count.