FR 1980 then FR 556 at Dublin
Riga → Dublin → Manchester
Timetable, Dublin time
00:30FR 1980 from Riga at the gate
16:25FR 556 to Manchester leaves the gate
15 h 55 apart on the timetable
FR 556 leaves 15 h 55 after FR 1980 arrives on the timetable: more than half a day, so not a connection we count.