FR 153 then BA 831 at Dublin
Leeds → Dublin → London Heathrow
Timetable, Dublin time
21:35FR 153 from Leeds at the gate
13:35BA 831 to London Heathrow leaves the gate
16 h apart on the timetable, overnight
BA 831 leaves 16 h after FR 153 arrives on the timetable: more than half a day, so not a connection we count.