BA 591 then VS 302 at Heathrow
Venezia → London → New Delhi
Timetable, London time
13:10BA 591 from Venezia at the gate
12:30VS 302 to New Delhi leaves the gate
23 h 20 apart on the timetable, overnight
VS 302 leaves 23 h 20 after BA 591 arrives on the timetable: more than half a day, so not a connection we count.