FR 4855 then AZ 204 at Fiumicino
Catania → Rome → London Heathrow
Timetable, Rome time
23:59FR 4855 from Catania at the gate
13:50AZ 204 to London Heathrow leaves the gate
13 h 51 apart on the timetable, overnight
AZ 204 leaves 13 h 51 after FR 4855 arrives on the timetable: more than half a day, so not a connection we count.