Most Virginias and Burleys are cased. The casing is applied toward the beginning of processing, and the casing are usually water-based. The tobacco is then sent through a drying chamber to get it back to a decent humidity level. Even when used in non-aromatic blends, those two types of leaf are almost always cased to mitigate some of the negative properties inherent in them. Top dressings are applied at the end and usually contain alcohol so they can dry due to evaporation, so the tobacco doesn't need to get heated again. Top dressings affect the aroma more than anything else, hence the term aromatic.
Also, when I started working in the business, around 1976, the definition of an English blend was one that had minimal added flavorings, and even then, they were from a list approved by the British government. Certain things, like liquors, were okay. Since Latakia blends usually meet the definition, they eventually became synonymous with English blends.
Russ