FR 456 then EI 168 at Dublin
Leeds → Dublin → London Heathrow
Timetable, Dublin time
15:30FR 456 from Leeds at the gate
14:15EI 168 to London Heathrow leaves the gate
22 h 45 apart on the timetable, overnight
EI 168 leaves 22 h 45 after FR 456 arrives on the timetable: more than half a day, so not a connection we count.