EI 3255 then FR 337 at Dublin
Edinburgh → Dublin → London Luton
Timetable, Dublin time
14:30EI 3255 from Edinburgh at the gate
08:00FR 337 to London Luton leaves the gate
17 h 30 apart on the timetable, overnight
FR 337 leaves 17 h 30 after EI 3255 arrives on the timetable: more than half a day, so not a connection we count.