BA 979 then BA 746 at Heathrow
Berlin → London → Geneva
Timetable, London time
15:20BA 979 from Berlin at the gate
10:30BA 746 to Geneva leaves the gate
19 h 10 apart on the timetable, overnight
BA 746 leaves 19 h 10 after BA 979 arrives on the timetable: more than half a day, so not a connection we count.