Google Adwords ‘Product Extension Ads’ Now Showing In The UK!

Here is one I spotted earlier:-

Google says

With product extensions you can show users the products from your site that are most relevant to their current query. You’re charged the same cost-per-click (CPC) whether a user clicks on your main text ad or any of the offers within the product extensions plusbox; however, you won’t be charged if a user simply expands the plusbox without clicking through to your site. Advertisers who implemented product extensions during our beta found that the additional product information helped improve the performance of their search campaigns. For example, Zeta interactive, who manages advertising for SonyStyle.com, reported seeing over a 10% increase in clickthrough rate (CTR) for their ads with product extensions.