Does English fizz need a name of its own?

I wonder if English sparkling now needs its own appellation? Ridgeview once had the idea of using the word Merret to identify English effervescents, and used the term on their labels for many years. It was inspired by Sir Christopher Merret, who was instrumental in the evolution of sparkling-wine methodology in the 17th century. Ridgeview appear to have sidelined the idea, however, since it no longer appears on their bottles.

More and more English producers are popping up each year, and sparkling wine is considered England's trump card. For both those reasons, some kind of regulated term relating to...