BA 807 then BA 746 at Heathrow
Copenhagen → London → Geneva
Timetable, London time
12:50BA 807 from Copenhagen at the gate
10:30BA 746 to Geneva leaves the gate
21 h 40 apart on the timetable, overnight
BA 746 leaves 21 h 40 after BA 807 arrives on the timetable: more than half a day, so not a connection we count.