Mad Squirrel Brewery, based near London at the foot of the Chiltern Hills, was founded in 2005 and is known for its innovative and evolving approach to brewing. The brewery produces a diverse range of beers, including core year-round offerings like pale ales, milk stouts, and pilsner lager, as well as occasional and limited releases. Mad Squirrel emphasizes quality, creativity, and pushing boundaries in beer-making. The brewery operates multiple taprooms, offers online sales, and partners with pubs and retailers. They have grown significantly over the years, continuously expanding their brewery and introducing new products.