BA 8083 then FR 6874 at Barcelona
London Heathrow → Barcelona → Dublin
Timetable, Barcelona time
13:10BA 8083 from London Heathrow at the gate
10:20FR 6874 to Dublin leaves the gate
21 h 10 apart on the timetable, overnight
FR 6874 leaves 21 h 10 after BA 8083 arrives on the timetable: more than half a day, so not a connection we count.