Cotleigh Ale's. At Cotleigh Brewery they are committed to producing a range of outstanding beers, brewed using a local source of water and locally grown malted barley. English hops and a unique strain of Cotleigh yeast combine to produce there Somerset cask conditioned beers. Barn Owl Premium Ale. Is a copper coloured full flavoured beer with hints of toffee and nut for a smooth, malty, bittersweet finish.