Clapham Junction Station
Clapham Junction is the busiest station in the country (and possibly in the world) in terms of the number of trains passing through each day (around 2000), and has 16 platforms numbered from 2 to 17.
Unfortunately, these facts combine with a relatively bad level of information to confound passengers unfamiliar with the station, since there is no indicator for which platform the next train to destination X leaves from (unlike London Bridge for example). The information on each platform is average with next (and second and third) train information like on the tube, but it's difficult to work out which platform to get to in the first place since they are served from a long subway. The following website offers an unofficial list of platforms and locations ar Clapham Junction: http://www.jamesnetherton.com/blog/2007/03/10/Which-platform-at-Clapham-Junction/
[South West Trains]?, [Southern]? and Silverlink (West London Line) serve Clapham Junction. Frequency to most destinations is very high, particularly Waterloo and Victoria which see trains virtually every couple of minutes for most of the day.
A large number of buses serve Clapham Junction (PDF link), making it very easy to get to. There is no tube to Clapham Junction, although the East London Line will serve it once the southern extension begins running (however, the ELL will become a National Rail service anyway once the extensions are open).one of the worst British rail accidents in recent history, when 3 commuter trains (carrying some 1300 passengers) collided following a signalling failure on 12 Dec 1988, killing 35 people. This accident lead to the Hidden enquiry which recommended the installation of Automatic Train Protection across the entire network (now installed on some lines, but deemed too expensive at current estimates of £6bn) and the removal of all "Mark I" stock in the country (now underway with the replacement of the entire train fleets of [South Eastern Trains]?, Southern and South West Trains).