FR 789 then BA 507 at Lisbon
Bologna → Lisbon → London Heathrow
Timetable, Lisbon time
18:15FR 789 from Bologna at the gate
15:50BA 507 to London Heathrow leaves the gate
21 h 35 apart on the timetable, overnight
BA 507 leaves 21 h 35 after FR 789 arrives on the timetable: more than half a day, so not a connection we count.