FR 555 then FR 1456 at Dublin
Manchester → Dublin → Brussels
Timetable, Dublin time
19:45FR 555 from Manchester at the gate
12:15FR 1456 to Brussels leaves the gate
16 h 30 apart on the timetable, overnight
FR 1456 leaves 16 h 30 after FR 555 arrives on the timetable: more than half a day, so not a connection we count.