FR 6974 then IB 5412 at Barcelona
Rome → Barcelona → London Gatwick
Timetable, Barcelona time
22:25FR 6974 from Rome at the gate
14:30IB 5412 to London Gatwick leaves the gatealso LL 5412, VY 7616, BA 8070
16 h 05 apart on the timetable, overnight
IB 5412 leaves 16 h 05 after FR 6974 arrives on the timetable: more than half a day, so not a connection we count.