FR 3877 then IB 719 at Madrid
Tangier → Madrid → London Heathrow
Timetable, Madrid time
17:35FR 3877 from Tangier at the gate
14:55IB 719 to London Heathrow leaves the gatealso VY 5226, QR 5346, LA 5409, DT 6162, BA 7054, AA 8653
21 h 20 apart on the timetable, overnight
IB 719 leaves 21 h 20 after FR 3877 arrives on the timetable: more than half a day, so not a connection we count.