FR 4903 then BA 549 at Fiumicino
Palermo → Rome → London Heathrow
Timetable, Rome time
18:10FR 4903 from Palermo at the gate
12:15BA 549 to London Heathrow leaves the gate
18 h 05 apart on the timetable, overnight
BA 549 leaves 18 h 05 after FR 4903 arrives on the timetable: more than half a day, so not a connection we count.