From Wikipedia:
Double Diamond Burton Ale was a brand of British ale brewed from 1876 to 2003. During the 1960s it was advertised heavily by Ind Coope, especially on TV, with the jingle: "A Double Diamond works wonders, works wonders, works wonders. A Double Diamond works wonders, so drink some today!" Carlsberg UK discontinued general sales of the brand in April 2003, though a small amount continued to be sold in bottles for some months.[19] Carlsberg UK still sells a Burton Ale seasonally in its Draught Cask series but under the Ind Coope brand, not as Double Diamond.