Well considering the ancestors came from various parts of England, with most coming from the North (Lancashire/Yorkshire border), and others from Scotland and Ireland, I'm more or less of British ancestry by geography.
The royal family is rather irrelevant to me.
In modern terms, I'm Australian, but I live in the US for now. My family wandered a lot, and I guess I have that gene. It's possible I could end up in NZ, Bulgaria or Afghanistan (Badakshan province), or even N. Pakistan (Karakoram) before I die. Governments and national borders are an inconvenience for me.
Some of my ancestors supported the Stuarts, and most likely those living in the south (London and surrounding counties) were more partial to Cromwell and the Parliamentarians.
In some ways perhaps, I'm more British the Elizabeth II. On the other hand, the English (Angels and Saxons) are of Germanic ancestry.