FR 661 then BA 829 at Dublin
Birmingham (UK) → Dublin → London Heathrow
Timetable, Dublin time
14:10FR 661 from Birmingham (UK) at the gate
11:00BA 829 to London Heathrow leaves the gate
20 h 50 apart on the timetable, overnight
BA 829 leaves 20 h 50 after FR 661 arrives on the timetable: more than half a day, so not a connection we count.