BA 276 then BA 746 at Heathrow
Hyderabad → London → Geneva
Timetable, London time
13:00BA 276 from Hyderabad at the gate
10:30BA 746 to Geneva leaves the gate
21 h 30 apart on the timetable, overnight
BA 746 leaves 21 h 30 after BA 276 arrives on the timetable: more than half a day, so not a connection we count.