Perhaps LO don't have the answer yet. While LO273/4 is gone from the timetable after 29SEP. LO779 still arrives in VNO at 16:20 and goes back to WAW next day at 09:00 as LO780 in-keeping with operating the LCY service. I'm sure they would adjust this if they lost LCY because it's an awfully long and expensive night stop for an E190 to sit around and do nothing...