FR 1557 then FR 1948 at Dublin
Manchester → Dublin → Luxembourg
Timetable, Dublin time
23:50FR 1557 from Manchester at the gate
12:25FR 1948 to Luxembourg leaves the gate
12 h 35 apart on the timetable, overnight
FR 1948 leaves 12 h 35 after FR 1557 arrives on the timetable: more than half a day, so not a connection we count.