FR 3976 then FR 152 at Dublin
Barcelona → Dublin → Leeds
Timetable, Dublin time
19:00FR 3976 from Barcelona at the gate
07:25FR 152 to Leeds leaves the gate
12 h 25 apart on the timetable, overnight
FR 152 leaves 12 h 25 after FR 3976 arrives on the timetable: more than half a day, so not a connection we count.