FR 1987 then FR 5131 at Dublin
Nantes → Dublin → Basel
Timetable, Dublin time
16:55FR 1987 from Nantes at the gate
13:50FR 5131 to Basel leaves the gate
20 h 55 apart on the timetable, overnight
FR 5131 leaves 20 h 55 after FR 1987 arrives on the timetable: more than half a day, so not a connection we count.