BA 817 then BA 406 at Heathrow
Copenhagen → London → Cairo
Timetable, London time
21:35BA 817 from Copenhagen at the gate
21:25BA 406 to Cairo leaves the gate
23 h 50 apart on the timetable, overnight
BA 406 leaves 23 h 50 after BA 817 arrives on the timetable: more than half a day, so not a connection we count.