“Downton Abbey” carried us away to a different time where we could imagine ourselves in white-tie formality or in elegant gowns with elbow-length-gloved hands holding martinis amongst royalty in a grand home’s halls. The martinis (or any drink), of course, should be made with Highclere Castle Gin, a brand launched in 2019 in partnership with the Earl and Countess of Carnarvon—owners of ...