Hi
While I'm at uni at York, Bournemouth is my home, so hopefully I'll be of help. The community in Bournemouth is pretty much non-existant, with few players playing at a competatively, and none with tournement experience that I'm aware of.
However Southampton and London are good places for smash, while London isn't having ranbats at the moment they are getting them sorted slowly but surely.
Also Southampton has a small but active community.
Southampton region thread -
http://www.smashboards.com/showthread.php?t=217072
There is also a tournement for melee 10th-11th April, thread found here -
http://www.smashboards.com/showthread.php?t=220011
So far the only brawl events are north, however there London will probably have events when they sort their ranbats, and there are brawl players in London.
Hope that helps