QR 109 then BA 366 at Heathrow
Doha → London → Marseille
Timetable, London time
14:00QR 109 from Doha at the gate
13:35BA 366 to Marseille leaves the gate
23 h 35 apart on the timetable, overnight
BA 366 leaves 23 h 35 after QR 109 arrives on the timetable: more than half a day, so not a connection we count.