BA 571 then BA 746 at Heathrow
Milan Linate → London → Geneva
Timetable, London time
15:15BA 571 from Milan Linate at the gate
10:30BA 746 to Geneva leaves the gate
19 h 15 apart on the timetable, overnight
BA 746 leaves 19 h 15 after BA 571 arrives on the timetable: more than half a day, so not a connection we count.