FR 776 then BA 477 at Barcelona
Venezia → Barcelona → London Heathrow
Timetable, Barcelona time
23:30FR 776 from Venezia at the gate
12:25BA 477 to London Heathrow leaves the gate
12 h 55 apart on the timetable, overnight
BA 477 leaves 12 h 55 after FR 776 arrives on the timetable: more than half a day, so not a connection we count.