I really don't mean to be pedantic, but it is, actually a really important point. The term northern soul was and is imposed on certain records, regardless of genre, to a certain extent. Records that set out to be
'northern soul', are the exception, derided, in the main, and know as tailor made's.
If someone ones looking from a sociological viewpoint, it's crucial to understand context. Northern soul is British, not from the United States!