FR 331 then FR 7156 at Dublin
London Luton → Dublin → Madrid
Timetable, Dublin time
17:15FR 331 from London Luton at the gate
09:10FR 7156 to Madrid leaves the gate
15 h 55 apart on the timetable, overnight
FR 7156 leaves 15 h 55 after FR 331 arrives on the timetable: more than half a day, so not a connection we count.