Same with the 1972 stock..did a few services.. the pladform is full of passengers but nobody boards the train..
Often I've noticed on this route when you open the doors to board passengers at the start of the service, loads disembark.
I'm rather glad when I find a service that has no passengers, most of the time the train is full and not a free seat to be had, especially on the Pendo's, even in first class. Shame there isn't a command in god mode to kick them all off!