FR 3976 then FR 156 at Dublin
Barcelona → Dublin → Leeds
Timetable, Dublin time
19:00FR 3976 from Barcelona at the gate
11:20FR 156 to Leeds leaves the gate
16 h 20 apart on the timetable, overnight
FR 156 leaves 16 h 20 after FR 3976 arrives on the timetable: more than half a day, so not a connection we count.