FR 893 then FR 6596 at Manchester
Knock → Manchester → Barcelona
Timetable, Manchester time
13:00FR 893 from Knock at the gate
06:30FR 6596 to Barcelona leaves the gate
17 h 30 apart on the timetable, overnight
FR 6596 leaves 17 h 30 after FR 893 arrives on the timetable: more than half a day, so not a connection we count.