FR 121 then FR 1556 at Dublin
London Gatwick → Dublin → Manchester
Timetable, Dublin time
20:50FR 121 from London Gatwick at the gate
13:00FR 1556 to Manchester leaves the gate
16 h 10 apart on the timetable, overnight
FR 1556 leaves 16 h 10 after FR 121 arrives on the timetable: more than half a day, so not a connection we count.