BA 367 then BA 512 at Heathrow
Marseille → London → Lisbon
Timetable, London time
19:25BA 367 from Marseille at the gate
19:05BA 512 to Lisbon leaves the gate
23 h 40 apart on the timetable, overnight
BA 512 leaves 23 h 40 after BA 367 arrives on the timetable: more than half a day, so not a connection we count.