FR 153 then FR 9987 at Dublin
Leeds → Dublin → Porto
Timetable, Dublin time
21:35FR 153 from Leeds at the gate
10:40FR 9987 to Porto leaves the gate
13 h 05 apart on the timetable, overnight
FR 9987 leaves 13 h 05 after FR 153 arrives on the timetable: more than half a day, so not a connection we count.