Consistency

M-D consist, common on suburban branches and on lighter patronaged lines during off-peak

M-T-D consist, as used on lighter graded lines

M-D-T-M consist, a standard 4 car set for lighter patronaged lines and off peak services

M-M consist which seems to have been used as a "locomotive" primarily for train haulage like those below

M-M consist providing an "E train" service, in this case with a short G-B-C consist for an outer suburban or country destination beyond the wires

M-M consist providing goods haulage capability

Mr Clapp would be happy.

Some further detail behind the Up platform - The VR made significant advertising revenue from billboards such as these during this era, and the posters I have used are from the period - including the opportunity to "Fly with Ulm" referring to flights by Sir Charles Kingsford Smith's co-pilot.