BA 1465 then BA 406 at Heathrow
Edinburgh → London → Cairo
Timetable, London time
09:15BA 1465 from Edinburgh at the gate
21:25BA 406 to Cairo leaves the gate
12 h 10 apart on the timetable
BA 406 leaves 12 h 10 after BA 1465 arrives on the timetable: more than half a day, so not a connection we count.