express multiple units from the 1970s and suburban multiple units from the 1980s
All over blue for compartment hauled stock until the last was withdrawn (from the GN lines) in 1976.
Also initially for all DMUs except classes 119-120, 123, 124, 201-203 , which went straight to blue/grey (althogh I think i recall seeing a class 120 with one all-blue power car)
EMus were initially all blue, but those with gangways (BEP/CEP, BIG/CIG, VEP, REP/TC) went to blue/grey very early (some were delivered new in that livery). Not sure if any AM( was ever all-over blue.
Blue/grey for all units started to be appolied in the early '80s