BA 484 then LA 5765 at Barcelona
London Heathrow → Barcelona → Firenze
Timetable, Barcelona time
16:00BA 484 from London Heathrow at the gate
15:40LA 5765 to Firenze leaves the gate
23 h 40 apart on the timetable, overnight
LA 5765 leaves 23 h 40 after BA 484 arrives on the timetable: more than half a day, so not a connection we count.