these guys have teamed up with AA - sounds like a merger more than independent review
http://www.motorcodes.co.uk/motorist/press-releases/motor-codes-unites-with-britains-most-trusted-brand.html
I'm using Motor Codes dispute resolution service for a complaint I have about an approved used Mercedes Benz I purchased in June.... ongoing so I cant comment how effective their service is or is not as of yet, but its nice to know there are other avenues available when making a complaint I guess.
