BA 961 then BA 746 at Heathrow
Hamburg → London → Geneva
Timetable, London time
12:20BA 961 from Hamburg at the gate
10:30BA 746 to Geneva leaves the gate
22 h 10 apart on the timetable, overnight
BA 746 leaves 22 h 10 after BA 961 arrives on the timetable: more than half a day, so not a connection we count.