BA 585 then BA 352 at Heathrow
Milan Linate → London → Nice
Timetable, London time
21:30BA 585 from Milan Linate at the gate
18:05BA 352 to Nice leaves the gate
20 h 35 apart on the timetable, overnight
BA 352 leaves 20 h 35 after BA 585 arrives on the timetable: more than half a day, so not a connection we count.