EI 3255 then FR 120 at Dublin
Edinburgh → Dublin → London Gatwick
Timetable, Dublin time
14:30EI 3255 from Edinburgh at the gate
11:40FR 120 to London Gatwick leaves the gate
21 h 10 apart on the timetable, overnight
FR 120 leaves 21 h 10 after EI 3255 arrives on the timetable: more than half a day, so not a connection we count.