Not heard of British Underground before, solooked at their website at http://britishunderground.net/.

Didn't tell me a great deal more to be honest (apart from the fact that having a grainy moving image as the background of your website is a b-a-a-a-a-d idea IMNSHO, so be forewarned); but I couldn't see where folk and other acoustic musics would fit into their ultra-cool on-trend image ...