AC 860 then BA 746 at Heathrow
Vancouver → London → Geneva
Timetable, London time
11:50AC 860 from Vancouver at the gate
10:30BA 746 to Geneva leaves the gate
22 h 40 apart on the timetable, overnight
BA 746 leaves 22 h 40 after AC 860 arrives on the timetable: more than half a day, so not a connection we count.