BA 359 then LX 355 at Heathrow
Lyon → London → Geneva
Timetable, London time
17:25BA 359 from Lyon at the gate
14:25LX 355 to Geneva leaves the gate
21 h apart on the timetable, overnight
LX 355 leaves 21 h after BA 359 arrives on the timetable: more than half a day, so not a connection we count.