FR 555 then EI 158 at Dublin
Manchester → Dublin → London Heathrow
Timetable, Dublin time
18:10FR 555 from Manchester at the gate
10:00EI 158 to London Heathrow leaves the gate
15 h 50 apart on the timetable, overnight
EI 158 leaves 15 h 50 after FR 555 arrives on the timetable: more than half a day, so not a connection we count.