A hopeful ruling about the Mosley BDSM case in the UK and
some background about the case (both links are worksafe)
For more info, see
The Spanner Trust (not worksafe), or the
Wikipedia page on Operation Spanner I saw one of the Trustees from the Spanner Trust speak at CLAW a few years ago, and found the distinctions between US and UK law about BDSM really fascinating (also, having it presented by a gorgeous shaven-headed leatherman with a british accent really didn't hurt *grin*). Worth reading up on, if you're interested in this sort of thing.