QR 3700 then BA 477 at Barcelona
Valladolid → Barcelona → London Heathrow
Timetable, Barcelona time
19:25QR 3700 from Valladolid at the gate
12:20BA 477 to London Heathrow leaves the gatealso IB 3659, AA 6815, VY 9555
16 h 55 apart on the timetable, overnight
BA 477 leaves 16 h 55 after QR 3700 arrives on the timetable: more than half a day, so not a connection we count.