FR 817 then FR 112 at Dublin
Edinburgh → Dublin → London Gatwick
Timetable, Dublin time
13:15FR 817 from Edinburgh at the gate
06:30FR 112 to London Gatwick leaves the gate
17 h 15 apart on the timetable, overnight
FR 112 leaves 17 h 15 after FR 817 arrives on the timetable: more than half a day, so not a connection we count.