FR 3976 then FR 660 at Dublin
Barcelona → Dublin → Birmingham (UK)
Timetable, Dublin time
19:00FR 3976 from Barcelona at the gate
13:45FR 660 to Birmingham (UK) leaves the gate
18 h 45 apart on the timetable, overnight
FR 660 leaves 18 h 45 after FR 3976 arrives on the timetable: more than half a day, so not a connection we count.