FR 275 then FR 552 at Dublin
Glasgow → Dublin → Manchester
Timetable, Dublin time
19:00FR 275 from Glasgow at the gate
15:30FR 552 to Manchester leaves the gate
20 h 30 apart on the timetable, overnight
FR 552 leaves 20 h 30 after FR 275 arrives on the timetable: more than half a day, so not a connection we count.