BA 1358 then FR 561 at Manchester
London Heathrow → Manchester → Dublin
Timetable, Manchester time
07:55BA 1358 from London Heathrow at the gate
20:50FR 561 to Dublin leaves the gate
12 h 55 apart on the timetable
FR 561 leaves 12 h 55 after BA 1358 arrives on the timetable: more than half a day, so not a connection we count.