BA 419 then EK 6 at Heathrow
Luxembourg → London → Dubai
Timetable, London time
09:55BA 419 from Luxembourg at the gate
22:00EK 6 to Dubai leaves the gate
12 h 05 apart on the timetable
EK 6 leaves 12 h 05 after BA 419 arrives on the timetable: more than half a day, so not a connection we count.