BA 371 then BA 736 at Heathrow
Toulouse → London → Geneva
Timetable, London time
13:15BA 371 from Toulouse at the gate
12:40BA 736 to Geneva leaves the gate
23 h 25 apart on the timetable, overnight
BA 736 leaves 23 h 25 after BA 371 arrives on the timetable: more than half a day, so not a connection we count.