In message , at 20:29:52 on Fri, 29 Jul
2011, D A Stocks remarked:
the (current) trains are usually standing room only between East
Croydon and London Bridge.

And it's best to pick somewhere to get on, where there's likely to be
other people getting off.

To set against the accommodation issue there's also the "get as far as
you can as soon as you can" rule. Which in this case would mean at least
Blackfriars northbound.
--
Roland Perry