Historical version 5 of Wandsworth Common Station (view current version)
Four platforms, two of which never seem to have trains stop at them. (This is because they are on the tracks for the fast trains. Trains late at night may stop at them. - bob)
Trains to Victoria or Croydon. The Victoria-bound platform-in-use has a sheltering roof; the other direction doesn't.
There is a ticket office - not sure what times it's open - a self-service ticket machine, and a Link cashpoint.