FR 262 then FR 340 at Dublin
Alicante → Dublin → London Luton
Timetable, Dublin time
16:10FR 262 from Alicante at the gate
14:40FR 340 to London Luton leaves the gate
22 h 30 apart on the timetable, overnight
FR 340 leaves 22 h 30 after FR 262 arrives on the timetable: more than half a day, so not a connection we count.