FR 157 then FR 1958 at Dublin
Leeds → Dublin → Nice
Timetable, Dublin time
21:40FR 157 from Leeds at the gate
16:40FR 1958 to Nice leaves the gate
19 h apart on the timetable, overnight
FR 1958 leaves 19 h after FR 157 arrives on the timetable: more than half a day, so not a connection we count.