On 13/12/2014 15:41, Roland Perry wrote:

In message , at 15:25:29 on Sat, 13 Dec
2014, D A Stocks remarked:
From the 12 January 2015, South West Trains passengers will be
unable to interchange at Waterloo East for London Bridge as services
will not be stopping at London Bridge. This is expected to continue
until August 2016.

How many people made that change?

A lot of people from SWT-land working in the London Bridge area.

Is it enough to cause an issue?

Yes. See the number of people making a Waterloo East - London Bridge
journey in the morning peak, for instance.