FR 1031 then FR 816 at Dublin
London Gatwick → Dublin → Edinburgh
Timetable, Dublin time
15:30FR 1031 from London Gatwick at the gate
13:15FR 816 to Edinburgh leaves the gate
21 h 45 apart on the timetable, overnight
FR 816 leaves 21 h 45 after FR 1031 arrives on the timetable: more than half a day, so not a connection we count.