EW 7520 then IB 5412 at Barcelona
Hamburg → Barcelona → London Gatwick
Timetable, Barcelona time
18:45EW 7520 from Hamburg at the gate
14:30IB 5412 to London Gatwick leaves the gatealso LL 5412, VY 7616, BA 8070
19 h 45 apart on the timetable, overnight
IB 5412 leaves 19 h 45 after EW 7520 arrives on the timetable: more than half a day, so not a connection we count.