FR 7807 then FR 6920 at Barcelona
London Luton → Barcelona → Dublin
Timetable, Barcelona time
17:45FR 7807 from London Luton at the gate
06:20FR 6920 to Dublin leaves the gate
12 h 35 apart on the timetable, overnight
FR 6920 leaves 12 h 35 after FR 7807 arrives on the timetable: more than half a day, so not a connection we count.