QR 3700 then BA 475 at Barcelona
Valladolid → Barcelona → London Heathrow
Timetable, Barcelona time
19:25QR 3700 from Valladolid at the gate
11:20BA 475 to London Heathrow leaves the gatealso IB 3658, LA 5488, AA 6814, VY 9640
15 h 55 apart on the timetable, overnight
BA 475 leaves 15 h 55 after QR 3700 arrives on the timetable: more than half a day, so not a connection we count.