EW 520 then FR 9015 at Barcelona
Cologne → Barcelona → London Stansted
Timetable, Barcelona time
14:45EW 520 from Cologne at the gate
07:30FR 9015 to London Stansted leaves the gate
16 h 45 apart on the timetable, overnight
FR 9015 leaves 16 h 45 after EW 520 arrives on the timetable: more than half a day, so not a connection we count.