QR 3702 then BA 481 at Barcelona
Berlin → Barcelona → London Heathrow
Timetable, Barcelona time
21:00QR 3702 from Berlin at the gate
15:05BA 481 to London Heathrow leaves the gatealso IB 3663, AA 6819, VY 9559, QR 9800
18 h 05 apart on the timetable, overnight
BA 481 leaves 18 h 05 after QR 3702 arrives on the timetable: more than half a day, so not a connection we count.