Freelance BBS: Clients - Need Audio Production help in London

I have a very talented friend who produces and writes his own music.(Rap/R&B) Everything he knows he taught himself. I was wondering if there is anyone in the London area who would be interested in giving him some help cleaning up a few tracks so that he can start preforming. If you'd like to help or know anyone looking for some experience with an up and coming artist let me know. cheers