FR 866 then IB 5408 at Barcelona
Venezia → Barcelona → London Gatwick
Timetable, Barcelona time
14:15FR 866 from Venezia at the gate
13:25IB 5408 to London Gatwick leaves the gatealso LL 5408, VY 7612
23 h 10 apart on the timetable, overnight
IB 5408 leaves 23 h 10 after FR 866 arrives on the timetable: more than half a day, so not a connection we count.