FR 509 then FR 156 at Dublin
Bristol → Dublin → Leeds
Timetable, Dublin time
20:10FR 509 from Bristol at the gate
14:55FR 156 to Leeds leaves the gate
18 h 45 apart on the timetable, overnight
FR 156 leaves 18 h 45 after FR 509 arrives on the timetable: more than half a day, so not a connection we count.