Marston’s Brewery is considered to be the world’s largest producer of cask ale beers, unfiltered and unpasteurized beers that often go through second fermentation and are served from cask. Cask ale is often termed as real ale, which makes this type of beers unique and what makes Marston’s Brewery stand out. Marston’s Brewing Company is an independent brewery and pub retailer in United Kingdom. Marston’s Brewery owns over 2,000 pubs across the country. The brewing company’s origin started way back in 1875 in the form of Wolverhampton & Dudley Breweries. Marston’s Brewery is known for use of foaming and double dropping process in its brewing methods in an effort to produce complex and unique beer flavors.