QR 3641 then BA 477 at Barcelona
Catania → Barcelona → London Heathrow
Timetable, Barcelona time
20:55QR 3641 from Catania at the gate
12:20BA 477 to London Heathrow leaves the gatealso IB 3659, AA 6815, VY 9555
15 h 25 apart on the timetable, overnight
BA 477 leaves 15 h 25 after QR 3641 arrives on the timetable: more than half a day, so not a connection we count.