It's interesting that other native groups, all of which have intermixed with others over thousands of years don't have to defend their right to their ethnic identity.

The English ethnic group is defined by a shared genetics and culture, the English enthic group isn't just political it is biological and can be identified via DNA.

I wouldn't consider my definition eccentric, it's based on the UN defintion: Ethnic group or ethnicity refers to a group of people whose members claim a common heritage or common ancestry and usually speak a common language and may have some common cultural practices.

The other thread argued that Boris Johnson is ethnically Turkic (I have no idea if that is true) on the assumption it is true, Boris Johnson may meet the requirement of a common language, but does not meet the requirement of a shared ancestry to be ethnically English.

Many of the groups that you mentioned existed in the UK over 1000 years ago, and shared in the same invasions, same issues, and developed a shared culture due to that shared history and closeness of relations, and of course as evidenced by DNA analysis interbreeding.

So yeah I would say that in the space of a millennium multiple groups can become one group.

I also