FR 6874 then BA 4467 at Dublin
Barcelona → Dublin → London City
Timetable, Dublin time
21:40FR 6874 from Barcelona at the gate
16:00BA 4467 to London City leaves the gate
18 h 20 apart on the timetable, overnight
BA 4467 leaves 18 h 20 after FR 6874 arrives on the timetable: more than half a day, so not a connection we count.