VS 301 then BA 746 at Heathrow
New Delhi → London → Geneva
Timetable, London time
15:55VS 301 from New Delhi at the gate
10:30BA 746 to Geneva leaves the gate
18 h 35 apart on the timetable, overnight
BA 746 leaves 18 h 35 after VS 301 arrives on the timetable: more than half a day, so not a connection we count.