FR 3977 then BA 8072 at Barcelona
Dublin → Barcelona → London Gatwick
Timetable, Barcelona time
22:55FR 3977 from Dublin at the gate
14:55BA 8072 to London Gatwick leaves the gate
16 h apart on the timetable, overnight
BA 8072 leaves 16 h after FR 3977 arrives on the timetable: more than half a day, so not a connection we count.