FR 6920 then EI 386 at Dublin
Barcelona → Dublin → London Heathrow
Timetable, Dublin time
23:55FR 6920 from Barcelona at the gate
19:45EI 386 to London Heathrow leaves the gate
19 h 50 apart on the timetable, overnight
EI 386 leaves 19 h 50 after FR 6920 arrives on the timetable: more than half a day, so not a connection we count.