BA 349 then BA 444 at Heathrow
Nice → London → Amsterdam
Timetable, London time
21:05BA 349 from Nice at the gate
16:30BA 444 to Amsterdam leaves the gate
19 h 25 apart on the timetable, overnight
BA 444 leaves 19 h 25 after BA 349 arrives on the timetable: more than half a day, so not a connection we count.