Heading back to YUL on Tuesday from LHR. No *I* left on the flights except for the LHR-YHZ flights, now here's the query these flights seem to show as xmd aircraft all the time, would this be correct? Reason I ask is that the flights are never full im talking plenty of empty seats so why would they run an XMD aircraft on this route? Any idea? I would rather take one of the other many flights through YUL or YYZ but no *I* remain however J9 and C9 on most flights. I would rather the upgrade now than have to play aero lotto but like Ive said before I have never experienced them clearing a flight a few days before. I have placed an alert for flight Departing LHR on 04/12/07 for YYZ on the 777 but for now ill book the YHZ flight to at least get a flat bed for the flight. Knowing my luck the flight will change out to an old aircraft and then the *I* on the 77 will open up.