Not to divert the thread, but more to the point is the lack of trains from Battersea Park in the direction of Wandsworth Road. And no through trains to/from Victoria from Wandsworth Road.
It used to be that you could get trains into South East London from Battersea Park, a few went round to London Bridge. But now there are none scheduled during the day (there are a few really early in the morning, and late at night - but I think this is just so they don't entirely lose the routes). Then they ripped up the tracks so there could be no through trains to/from Victoria, and more or less stopped any trains to/from Wandsworth Road. I do see trains on the route, but they aren't timetabled.
The suggested route to get a train service into SE London is:
Get a bus from Battersea Park to Wandsworth Road.
Catch a train from Battersea Park to Clapham Junction, then get another one to Wandsworth Road.
Trains to/from Victoria to/from Wandsworth Road use a line parallel to skirt around Battersea Park.