These brands were rated using YouGov BrandIndex’s Buzz score which asks respondents, "If you've heard anything about the brand in the last two weeks, through advertising, news or word of mouth, was it positive or negative?"

The Buzz Rankings chart shows the brands with the highest Buzz average scores between January and December 2011. The Buzz Improvers chart ranks the brands with the highest increase in Buzz between Jan-Dec 2011 and the same period in 2010. Both scores are representative of the individual segments.

All Buzz scores listed have been rounded to a single decimal place, however, we have used additional precision to assign ranks.