FR 4584 then FR 5270 at Barcelona
Porto → Barcelona → Manchester
Timetable, Barcelona time
18:35FR 4584 from Porto at the gate
12:45FR 5270 to Manchester leaves the gate
18 h 10 apart on the timetable, overnight
FR 5270 leaves 18 h 10 after FR 4584 arrives on the timetable: more than half a day, so not a connection we count.