Are you sure? 98 is showing as a 767 from Oct.30th -> Jan.6 with 92 going from a 767 to a 777 on Oct.30. Starting Jan.7 both flights are 777. This is from the timetables on the BA website. On this route though the equipment is always changing so it's best to keep an eye on it in MMB if you have a booking because in my experience BA doesn't notify you of an equipment change they just change your seat assignment. We weren't supposed to get the 744 in 2011 but thankfully we did.