BA 669 then BA 576 at Heathrow
Marrakesh → London → Milan Linate
Timetable, London time
20:45BA 669 from Marrakesh at the gate
18:35BA 576 to Milan Linate leaves the gate
21 h 50 apart on the timetable, overnight
BA 576 leaves 21 h 50 after BA 669 arrives on the timetable: more than half a day, so not a connection we count.