FR 815 then BA 827 at Dublin
Edinburgh → Dublin → London Heathrow
Timetable, Dublin time
20:05FR 815 from Edinburgh at the gate
15:10BA 827 to London Heathrow leaves the gate
19 h 05 apart on the timetable, overnight
BA 827 leaves 19 h 05 after FR 815 arrives on the timetable: more than half a day, so not a connection we count.