FR 3976 then FR 666 at Dublin
Barcelona → Dublin → Birmingham (UK)
Timetable, Dublin time
19:00FR 3976 from Barcelona at the gate
12:15FR 666 to Birmingham (UK) leaves the gate
17 h 15 apart on the timetable, overnight
FR 666 leaves 17 h 15 after FR 3976 arrives on the timetable: more than half a day, so not a connection we count.