FR 339 then FR 506 at Dublin
London Luton → Dublin → Bristol
Timetable, Dublin time
14:30FR 339 from London Luton at the gate
14:20FR 506 to Bristol leaves the gate
23 h 50 apart on the timetable, overnight
FR 506 leaves 23 h 50 after FR 339 arrives on the timetable: more than half a day, so not a connection we count.