Creare
Creare are one of the UK’s leading SEO companies, with over a decade of knowledge and experience in web design and online marketing. They have an extensive portfolio, and run staff of around 150. Dealing with everything from ecommerce through to Google adwords (PPC), they pride themselves on their ability to make your site money.
However, they do things that can be considered bad practice by other SEO firms, such as black hat tactics. After a quick search on some review sites, it would appear they promise the earth, quick to take your money, and then promptly do nothing. One reveiw even suggested that the positive comments that appear on one site, all came within a few days of each other. Source.