BA 365 then BA 572 at Heathrow
Marseille → London → Milan Linate
Timetable, London time
12:45BA 365 from Marseille at the gate
12:35BA 572 to Milan Linate leaves the gate
23 h 50 apart on the timetable, overnight
BA 572 leaves 23 h 50 after BA 365 arrives on the timetable: more than half a day, so not a connection we count.