LO 279 then BA 680 at Heathrow
Warsaw → London → Istanbul
Timetable, London time
17:20LO 279 from Warsaw at the gate
17:10BA 680 to Istanbul leaves the gate
23 h 50 apart on the timetable, overnight
BA 680 leaves 23 h 50 after LO 279 arrives on the timetable: more than half a day, so not a connection we count.