FR 815 then BA 831 at Dublin
Edinburgh → Dublin → London Heathrow
Timetable, Dublin time
20:05FR 815 from Edinburgh at the gate
13:00BA 831 to London Heathrow leaves the gate
16 h 55 apart on the timetable, overnight
BA 831 leaves 16 h 55 after FR 815 arrives on the timetable: more than half a day, so not a connection we count.