Firstly, Many thanks for the replies on the loco question, N464 actually was on this mornings train.
Now,this mornings Albury bound (down) consist was extremely interesting. The train consist being N464, 2 BN's an ACN and a power van. Missing were a BN and a BRN. As far as I can determine current VLine managment simply do not remove cars from a consist. Is this the prelude for a 4th SG pass set. With the current timetable a 4th loco and pass set would get rid of a good portion of the cancellations, as there would be a complete spare set, loco and cars if any maintence was being done.