BA 349 then EK 30 at Heathrow
Nice → London → Dubai
Timetable, London time
21:05BA 349 from Nice at the gate
15:50EK 30 to Dubai leaves the gate
18 h 45 apart on the timetable, overnight
EK 30 leaves 18 h 45 after BA 349 arrives on the timetable: more than half a day, so not a connection we count.