BA 669 then BA 350 at Heathrow
Marrakesh → London → Nice
Timetable, London time
20:45BA 669 from Marrakesh at the gate
17:30BA 350 to Nice leaves the gate
20 h 45 apart on the timetable, overnight
BA 350 leaves 20 h 45 after BA 669 arrives on the timetable: more than half a day, so not a connection we count.