BA 1473 then TK 1984 at Heathrow
Glasgow → London → Istanbul
Timetable, London time
10:20BA 1473 from Glasgow at the gate
22:40TK 1984 to Istanbul leaves the gate
12 h 20 apart on the timetable
TK 1984 leaves 12 h 20 after BA 1473 arrives on the timetable: more than half a day, so not a connection we count.