BA 399 then BA 1364 at Heathrow
Cairo → London → Manchester
Timetable, London time
09:10BA 399 from Cairo at the gate
08:40BA 1364 to Manchester leaves the gate
23 h 30 apart on the timetable, overnight
BA 1364 leaves 23 h 30 after BA 399 arrives on the timetable: more than half a day, so not a connection we count.