FR 6815 then FR 3204 at Manchester
Madrid → Manchester → Roma
Timetable, Manchester time
18:35FR 6815 from Madrid at the gate
13:05FR 3204 to Roma leaves the gate
18 h 30 apart on the timetable, overnight
FR 3204 leaves 18 h 30 after FR 6815 arrives on the timetable: more than half a day, so not a connection we count.