FR 813 then FR 332 at Dublin
Edinburgh → Dublin → London Luton
Timetable, Dublin time
21:00FR 813 from Edinburgh at the gate
09:30FR 332 to London Luton leaves the gate
12 h 30 apart on the timetable, overnight
FR 332 leaves 12 h 30 after FR 813 arrives on the timetable: more than half a day, so not a connection we count.