FR 3977 then LS 804 at Barcelona
Dublin → Barcelona → Manchester
Timetable, Barcelona time
19:05FR 3977 from Dublin at the gate
12:00LS 804 to Manchester leaves the gate
16 h 55 apart on the timetable, overnight
LS 804 leaves 16 h 55 after FR 3977 arrives on the timetable: more than half a day, so not a connection we count.