I checked with my father who worked for BR in the 1960's and he advised that the TOPS list never had a class 80.  He wasn't sure about class 41 however. Yes class 34 was originally assigned to the latter class 33/1, as well class 30 was for the latter 31/0 and 72 for the 73/0. Obviously the list was revised at some point, but I would agree that it would appear that assigning class 80 to E2001 is speculation. 198.134.2.62