Apologies if there is another thread on this! Looking for info on upgrading at KUL to Buiss class for our flight to SIN! As I booked with BA my flight is not eligible for upgrade on MH website! I will be arriving into KUL from BKK the night beforehand, would they upgrade if availability then? Also has anyone upgraded from economy to Buisness on a Avios reward ticket before ? Thanks in advance for any info