FR 1739 then FR 332 at Dublin
Valencia → Dublin → London Luton
Timetable, Dublin time
20:25FR 1739 from Valencia at the gate
09:20FR 332 to London Luton leaves the gate
12 h 55 apart on the timetable, overnight
FR 332 leaves 12 h 55 after FR 1739 arrives on the timetable: more than half a day, so not a connection we count.