FR 6596 then W9 5378 at Barcelona
Manchester → Barcelona → London Luton
Timetable, Barcelona time
23:40FR 6596 from Manchester at the gate
16:10W9 5378 to London Luton leaves the gate
16 h 30 apart on the timetable, overnight
W9 5378 leaves 16 h 30 after FR 6596 arrives on the timetable: more than half a day, so not a connection we count.