FR 3977 then BA 8068 at Barcelona
Dublin → Barcelona → London Gatwick
Timetable, Barcelona time
19:05FR 3977 from Dublin at the gate
13:55BA 8068 to London Gatwick leaves the gate
18 h 50 apart on the timetable, overnight
BA 8068 leaves 18 h 50 after FR 3977 arrives on the timetable: more than half a day, so not a connection we count.