BA 349 then BA 446 at Heathrow
Nice → London → Amsterdam
Timetable, London time
21:05BA 349 from Nice at the gate
17:55BA 446 to Amsterdam leaves the gate
20 h 50 apart on the timetable, overnight
BA 446 leaves 20 h 50 after BA 349 arrives on the timetable: more than half a day, so not a connection we count.