FR 1987 then FR 6875 at Dublin
Nantes → Dublin → Barcelona
Timetable, Dublin time
16:55FR 1987 from Nantes at the gate
15:50FR 6875 to Barcelona leaves the gate
22 h 55 apart on the timetable, overnight
FR 6875 leaves 22 h 55 after FR 1987 arrives on the timetable: more than half a day, so not a connection we count.