I have just launched Sound Reviewed, a site aimed mostly at reviewing tracks (from all genres), studio reviews (working on that), and other music related content. Most of the reviews are purely based on opinion, but have some information and facts.
If you have a studio in London, and you want it reviewed on the site, get in touch with me. If you have your own music and want to get it reviewed, also get in touch, send me an email. suggestions, feedback, interesting content you like to see on the site, ideas, criticism, what you dont like, etc... (email is in "about me" section of the site)