FR 7153 then FR 332 at Dublin
Santander → Dublin → London Luton
Timetable, Dublin time
23:35FR 7153 from Santander at the gate
13:55FR 332 to London Luton leaves the gate
14 h 20 apart on the timetable, overnight
FR 332 leaves 14 h 20 after FR 7153 arrives on the timetable: more than half a day, so not a connection we count.