FR 554 then EI 3615 at Manchester
Dublin → Manchester → Belfast City
Timetable, Manchester time
21:10FR 554 from Dublin at the gate
16:05EI 3615 to Belfast City leaves the gate
18 h 55 apart on the timetable, overnight
EI 3615 leaves 18 h 55 after FR 554 arrives on the timetable: more than half a day, so not a connection we count.