BA 1303 then BA 678 at Heathrow
Aberdeen → London → Istanbul
Timetable, London time
12:10BA 1303 from Aberdeen at the gate
10:35BA 678 to Istanbul leaves the gate
22 h 25 apart on the timetable, overnight
BA 678 leaves 22 h 25 after BA 1303 arrives on the timetable: more than half a day, so not a connection we count.