FR 338 then FR 1556 at Dublin
London Luton → Dublin → Manchester
Timetable, Dublin time
18:20FR 338 from London Luton at the gate
13:00FR 1556 to Manchester leaves the gate
18 h 40 apart on the timetable, overnight
FR 1556 leaves 18 h 40 after FR 338 arrives on the timetable: more than half a day, so not a connection we count.