LX 1175 then BA 723 at Zurich
Stuttgart → Zurich → London Heathrow
Timetable, Zurich time
21:15LX 1175 from Stuttgart at the gate
21:10BA 723 to London Heathrow leaves the gate
23 h 55 apart on the timetable, overnight
BA 723 leaves 23 h 55 after LX 1175 arrives on the timetable: more than half a day, so not a connection we count.