FR 5817 then BA 553 at Fiumicino
Bari → Rome → London Heathrow
Timetable, Rome time
15:35FR 5817 from Bari at the gate
13:50BA 553 to London Heathrow leaves the gate
22 h 15 apart on the timetable, overnight
BA 553 leaves 22 h 15 after FR 5817 arrives on the timetable: more than half a day, so not a connection we count.