EI 3301 then FR 812 at Dublin
Southampton → Dublin → Edinburgh
Timetable, Dublin time
11:00EI 3301 from Southampton at the gate
07:30FR 812 to Edinburgh leaves the gate
20 h 30 apart on the timetable, overnight
FR 812 leaves 20 h 30 after EI 3301 arrives on the timetable: more than half a day, so not a connection we count.