FR 1987 then FR 1030 at Dublin
Nantes → Dublin → London Gatwick
Timetable, Dublin time
16:55FR 1987 from Nantes at the gate
09:35FR 1030 to London Gatwick leaves the gate
16 h 40 apart on the timetable, overnight
FR 1030 leaves 16 h 40 after FR 1987 arrives on the timetable: more than half a day, so not a connection we count.