BA 550 then FR 3181 at Fiumicino
London Heathrow → Rome → Barcelona
Timetable, Rome time
11:20BA 550 from London Heathrow at the gate
10:25FR 3181 to Barcelona leaves the gate
23 h 05 apart on the timetable, overnight
FR 3181 leaves 23 h 05 after BA 550 arrives on the timetable: more than half a day, so not a connection we count.