VS 303 then BA 756 at Heathrow
New Delhi → London → Basel
Timetable, London time
09:30VS 303 from New Delhi at the gate
09:25BA 756 to Basel leaves the gate
23 h 55 apart on the timetable, overnight
BA 756 leaves 23 h 55 after VS 303 arrives on the timetable: more than half a day, so not a connection we count.