VS 359 then BA 594 at Heathrow
Mumbai → London → Venezia
Timetable, London time
10:15VS 359 from Mumbai at the gate
10:05BA 594 to Venezia leaves the gate
23 h 50 apart on the timetable, overnight
BA 594 leaves 23 h 50 after VS 359 arrives on the timetable: more than half a day, so not a connection we count.