AF 7307 then U2 2857 at Charles de Gaulle
Nice → Paris → Southampton
Timetable, Paris time
16:40AF 7307 from Nice at the gate
16:10U2 2857 to Southampton leaves the gate
23 h 30 apart on the timetable, overnight
U2 2857 leaves 23 h 30 after AF 7307 arrives on the timetable: more than half a day, so not a connection we count.