BA 309 then QR 110 at Heathrow
Paris Charles de Gaulle → London → Doha
Timetable, London time
16:00BA 309 from Paris Charles de Gaulle at the gate
15:30QR 110 to Doha leaves the gate
23 h 30 apart on the timetable, overnight
QR 110 leaves 23 h 30 after BA 309 arrives on the timetable: more than half a day, so not a connection we count.