FR 153 then BA 827 at Dublin
Leeds → Dublin → London Heathrow
Timetable, Dublin time
21:35FR 153 from Leeds at the gate
15:00BA 827 to London Heathrow leaves the gate
17 h 25 apart on the timetable, overnight
BA 827 leaves 17 h 25 after FR 153 arrives on the timetable: more than half a day, so not a connection we count.