FR 3977 then IB 5408 at Barcelona
Dublin → Barcelona → London Gatwick
Timetable, Barcelona time
22:55FR 3977 from Dublin at the gate
13:25IB 5408 to London Gatwick leaves the gatealso LL 5408, VY 7612
14 h 30 apart on the timetable, overnight
IB 5408 leaves 14 h 30 after FR 3977 arrives on the timetable: more than half a day, so not a connection we count.