FR 338 then FR 1456 at Dublin
London Luton → Dublin → Brussels
Timetable, Dublin time
18:20FR 338 from London Luton at the gate
12:15FR 1456 to Brussels leaves the gate
17 h 55 apart on the timetable, overnight
FR 1456 leaves 17 h 55 after FR 338 arrives on the timetable: more than half a day, so not a connection we count.