BA 933 then BA 746 at Heathrow
Düsseldorf → London → Geneva
Timetable, London time
13:20BA 933 from Düsseldorf at the gate
10:30BA 746 to Geneva leaves the gate
21 h 10 apart on the timetable, overnight
BA 746 leaves 21 h 10 after BA 933 arrives on the timetable: more than half a day, so not a connection we count.