IB 5953 then BA 483 at Barcelona
Salerno → Barcelona → London Heathrow
Timetable, Barcelona time
00:30IB 5953 from Salerno at the gate
15:30BA 483 to London Heathrow leaves the gate
15 h apart on the timetable
BA 483 leaves 15 h after IB 5953 arrives on the timetable: more than half a day, so not a connection we count.