BA 359 then BA 746 at Heathrow
Lyon → London → Geneva
Timetable, London time
15:20BA 359 from Lyon 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 359 arrives on the timetable: more than half a day, so not a connection we count.