FR 1987 then FR 9611 at Dublin
Nantes → Dublin → Rome
Timetable, Dublin time
16:55FR 1987 from Nantes at the gate
08:25FR 9611 to Rome leaves the gate
15 h 30 apart on the timetable, overnight
FR 9611 leaves 15 h 30 after FR 1987 arrives on the timetable: more than half a day, so not a connection we count.