LETTERBOX LIQUORICE – DELIVERING THE WORLD’S BEST LIQUORICE. For many, Liquorice is just black liquorice wheels or liquorice allsorts. For us, it is so much much more. We are dedicated to supplying our customers with the best liquorice from all around the world. As a family business we have been selling confectionery for many years at many different festivals and events including Glastonbury and Proms in the Park. We are lucky to have met and served some incredible people up and down the country.