BA 349 then BA 316 at Heathrow
Nice → London → Paris Charles de Gaulle
Timetable, London time
21:05BA 349 from Nice at the gate
16:25BA 316 to Paris Charles de Gaulle leaves the gate
19 h 20 apart on the timetable, overnight
BA 316 leaves 19 h 20 after BA 349 arrives on the timetable: more than half a day, so not a connection we count.