BA 371 then BA 734 at Heathrow
Toulouse → London → Geneva
Timetable, London time
12:05BA 371 from Toulouse at the gate
11:55BA 734 to Geneva leaves the gate
23 h 50 apart on the timetable, overnight
BA 734 leaves 23 h 50 after BA 371 arrives on the timetable: more than half a day, so not a connection we count.