FR 535 then FR 373 at Dublin
Nottingham → Dublin → London Luton
Timetable, Dublin time
14:35FR 535 from Nottingham at the gate
11:15FR 373 to London Luton leaves the gate
20 h 40 apart on the timetable, overnight
FR 373 leaves 20 h 40 after FR 535 arrives on the timetable: more than half a day, so not a connection we count.