BA 478 then FR 6874 at Barcelona
London Heathrow → Barcelona → Dublin
Timetable, Barcelona time
11:35BA 478 from London Heathrow at the gate
10:45FR 6874 to Dublin leaves the gate
23 h 10 apart on the timetable, overnight
FR 6874 leaves 23 h 10 after BA 478 arrives on the timetable: more than half a day, so not a connection we count.