FR 667 then FR 332 at Dublin
Birmingham (UK) → Dublin → London Luton
Timetable, Dublin time
18:05FR 667 from Birmingham (UK) at the gate
14:50FR 332 to London Luton leaves the gate
20 h 45 apart on the timetable, overnight
FR 332 leaves 20 h 45 after FR 667 arrives on the timetable: more than half a day, so not a connection we count.