LX 316 then BA 592 at Heathrow
Zurich → London → Venezia
Timetable, London time
08:05LX 316 from Zurich at the gate
07:55BA 592 to Venezia leaves the gate
23 h 50 apart on the timetable, overnight
BA 592 leaves 23 h 50 after LX 316 arrives on the timetable: more than half a day, so not a connection we count.