Anyone happen to know the reason for the frequent cancellation of AC 855 (LHR-YYZ) over the next few weeks? This leaves only three flights a day on that route, which seems less than optimal as all fare buckets on most days are fully booked according to EF. Fortunately, I'm booked on 857 (Aug 12) so it doesn't affect me directly (but it does eliminate any chance of an EUP!).