QR 3710 then BA 495 at Barcelona
Paris Charles de Gaulle → Barcelona → London Heathrow
Timetable, Barcelona time
23:35QR 3710 from Paris Charles de Gaulle at the gatealso LL 5455, VY 8063
20:45BA 495 to London Heathrow leaves the gatealso IB 3821, AA 6817, CX 7171, VY 9614
21 h 10 apart on the timetable, overnight
BA 495 leaves 21 h 10 after QR 3710 arrives on the timetable: more than half a day, so not a connection we count.