FR 819 then EI 158 at Dublin
Edinburgh → Dublin → London Heathrow
Timetable, Dublin time
12:15FR 819 from Edinburgh at the gate
10:00EI 158 to London Heathrow leaves the gate
21 h 45 apart on the timetable, overnight
EI 158 leaves 21 h 45 after FR 819 arrives on the timetable: more than half a day, so not a connection we count.