FR 339 then FR 1918 at Dublin
London Luton → Dublin → Manchester
Timetable, Dublin time
20:30FR 339 from London Luton at the gate
14:25FR 1918 to Manchester leaves the gate
17 h 55 apart on the timetable, overnight
FR 1918 leaves 17 h 55 after FR 339 arrives on the timetable: more than half a day, so not a connection we count.