Not that I know of.

Although I'd be interested if there were. I never hear anything about them anyway. You know, I think they should do them (if they don't already), because I think they could sell well, especially in South London for example. And it'd be great promotion for the rappers trying to make it to get in there aswell.
But I've noticed people in the UK have been getting less interested in hip hop the past couple of years, and things seem to just be getting worse, so there might not be much point now... If there are any popular rap magazines around, I really don't think they'll be going for much longer due to the decreasing interest. Euro-dance is taking over now.