TK 1933 then BA 420 at Heathrow
Istanbul → London → Luxembourg
Timetable, London time
14:45TK 1933 from Istanbul at the gate
14:35BA 420 to Luxembourg leaves the gate
23 h 50 apart on the timetable, overnight
BA 420 leaves 23 h 50 after TK 1933 arrives on the timetable: more than half a day, so not a connection we count.