IB 5387 then BA 477 at Barcelona
Bologna → Barcelona → London Heathrow
Timetable, Barcelona time
16:00IB 5387 from Bologna at the gatealso LL 5387
12:40BA 477 to London Heathrow leaves the gate
20 h 40 apart on the timetable, overnight
BA 477 leaves 20 h 40 after IB 5387 arrives on the timetable: more than half a day, so not a connection we count.