FR 815 then EI 158 at Dublin
Edinburgh → Dublin → London Heathrow
Timetable, Dublin time
20:25FR 815 from Edinburgh at the gate
10:00EI 158 to London Heathrow leaves the gate
13 h 35 apart on the timetable, overnight
EI 158 leaves 13 h 35 after FR 815 arrives on the timetable: more than half a day, so not a connection we count.