FR 2240 then BA 477 at Barcelona
Marrakesh → Barcelona → London Heathrow
Timetable, Barcelona time
15:00FR 2240 from Marrakesh at the gate
12:20BA 477 to London Heathrow leaves the gate
21 h 20 apart on the timetable, overnight
BA 477 leaves 21 h 20 after FR 2240 arrives on the timetable: more than half a day, so not a connection we count.