FR 815 then BA 837 at Dublin
Edinburgh → Dublin → London Heathrow
Timetable, Dublin time
07:05FR 815 from Edinburgh at the gate
19:25BA 837 to London Heathrow leaves the gate
12 h 20 apart on the timetable
BA 837 leaves 12 h 20 after FR 815 arrives on the timetable: more than half a day, so not a connection we count.