FR 6974 then IB 5410 at Barcelona
Rome → Barcelona → London Gatwick
Timetable, Barcelona time
22:25FR 6974 from Rome at the gate
13:55IB 5410 to London Gatwick leaves the gatealso LL 5410, VY 7614
15 h 30 apart on the timetable, overnight
IB 5410 leaves 15 h 30 after FR 6974 arrives on the timetable: more than half a day, so not a connection we count.