BA 349 then QR 110 at Heathrow
Nice → London → Doha
Timetable, London time
21:05BA 349 from Nice at the gate
15:30QR 110 to Doha leaves the gate
18 h 25 apart on the timetable, overnight
QR 110 leaves 18 h 25 after BA 349 arrives on the timetable: more than half a day, so not a connection we count.