Cask; Special. Adnams Flagship has been brewed exclusively to commemorate the 200th anniversary of the Battle of Trafalgar and to signal our admiration and respect for the great maritime tradition of England’s East Coast. It’s a seaworthy 4.3% ABV brew, with fragrant aromas of hops and spices and hints of banana. Look further and you’ll pick up traces of pepper, dark fruits and caramelised orange.