BA 725 then BA 370 at Heathrow
Zurich → London → Toulouse
Timetable, London time
07:45BA 725 from Zurich at the gate
07:40BA 370 to Toulouse leaves the gate
23 h 55 apart on the timetable, overnight
BA 370 leaves 23 h 55 after BA 725 arrives on the timetable: more than half a day, so not a connection we count.