FR 776 then BA 481 at Barcelona
Venezia → Barcelona → London Heathrow
Timetable, Barcelona time
23:30FR 776 from Venezia at the gate
14:40BA 481 to London Heathrow leaves the gate
15 h 10 apart on the timetable, overnight
BA 481 leaves 15 h 10 after FR 776 arrives on the timetable: more than half a day, so not a connection we count.