"The girls 'shaker Morris' style" tends to be a more Northern activity, although I don't know its spread, and as DeG says seems to be mainly young women and girls, and highly competitive from what I've heard.

It's official name, AFAIK, is Carnival Morris. It seems to keep a low profile outside of its home areas.

It is similar in style to US Majorette activities, and hence is often called "Fluffy" Morris - although usually, I suspect, from a safe distance.

Malcolm