Foursquare Rum Distillery Diadem. For once, I am actually familiar with a term being used on one of these fancy named Foursquare bottlings. We’ll get round to that shortly.
A Diadem is actually a jewelled headband worn as a sign of sovereignty. In other words it something the Queen might put on, when she can’t be arsed with the full faff on, of sticking one of her crowns upon the Royal bonce. Or something like that.