The line past the loco maintenance facilities has been severed which cuts off the access to what remains of the Southern line to the terminus at Friary and which included the branch to the docks, is no longer part of the network. Some of my earliest memories include catching the morning train to Waterloo, actually Surbiton where we alighted, when visiting relatives there. All that remained until recently was a loop for the docks line, on the site of the former goods yard!
Brian.