FR 6879 then SK 1517 at Copenhagen
Manchester → Copenhagen → London Heathrow
Timetable, Copenhagen time
19:50FR 6879 from Manchester at the gate
16:40SK 1517 to London Heathrow leaves the gate
20 h 50 apart on the timetable, overnight
SK 1517 leaves 20 h 50 after FR 6879 arrives on the timetable: more than half a day, so not a connection we count.