BA 1367 then BA 596 at Heathrow
Manchester → London → Venezia
Timetable, London time
13:55BA 1367 from Manchester at the gate
13:50BA 596 to Venezia leaves the gate
23 h 55 apart on the timetable, overnight
BA 596 leaves 23 h 55 after BA 1367 arrives on the timetable: more than half a day, so not a connection we count.