BA 679 then MU 552 at Heathrow
Istanbul → London → Shanghai
Timetable, London time
22:35BA 679 from Istanbul at the gate
21:00MU 552 to Shanghai leaves the gate
22 h 25 apart on the timetable, overnight
MU 552 leaves 22 h 25 after BA 679 arrives on the timetable: more than half a day, so not a connection we count.