FR 813 then FR 112 at Dublin
Edinburgh → Dublin → London Gatwick
Timetable, Dublin time
18:15FR 813 from Edinburgh at the gate
06:30FR 112 to London Gatwick leaves the gate
12 h 15 apart on the timetable, overnight
FR 112 leaves 12 h 15 after FR 813 arrives on the timetable: more than half a day, so not a connection we count.