FR 6927 then AZ 204 at Fiumicino
Barcelona → Rome → London Heathrow
Timetable, Rome time
18:40FR 6927 from Barcelona at the gate
13:50AZ 204 to London Heathrow leaves the gate
19 h 10 apart on the timetable, overnight
AZ 204 leaves 19 h 10 after FR 6927 arrives on the timetable: more than half a day, so not a connection we count.