FR 665 then EI 166 at Dublin
Birmingham (UK) → Dublin → London Heathrow
Timetable, Dublin time
19:20FR 665 from Birmingham (UK) at the gate
13:00EI 166 to London Heathrow leaves the gate
17 h 40 apart on the timetable, overnight
EI 166 leaves 17 h 40 after FR 665 arrives on the timetable: more than half a day, so not a connection we count.