Just my interpretation . . .
commented 9 minutes ago by Lesley Scott
Understood. Just offering my thoughts in return. I personally don't regard "British" as a nationality, as there are 3 countries, each their own "nationality" on the island .. then you could add those of Northern Ireland.
My ancestors weren't necessarily Britons, even if they were born in England, or Scotland, but they were English and Scottish. (I can't claim Welsh that I know of, but my children can.) Does them being of Scottish, or English, nationality make them British? Yes, but not (as *I* see it) as a nationality; more of a collective.
The English are English and speak English with regional dialectal differences.
The Scottish are Scottish and speak English with regional variations, and also (those who wish/know how) speak Gaelic.
The Welsh are Welsh and speak English sometimes, depending on where it is they are from. Often forgotten as ever having been separately ruled ever since they were absorbed by Edward I so long ago. If I remember correctly, the Welsh language was forcibly repressed and we are fortunate it wasn't completely eradicated by the English invader/conquerors/oppressors/insert your own term here. (There was a recorded decrease in Welsh speakers 2001-2011, but reports since indicate there may now be a slight increase.)
So, although I am not natively English, or Scottish, I hold rather strong views on what is or isn't "English". (Cain't blame a gal for being opinionated! (and that is MEANT to be cain't, not can't.))
I have to admit that it totally bugs me that almost every American I have met in person (and many I have not met, but merely heard on the radio) says "British accent" when they mean "English accent", because they differentiate the Scottish accent as Scottish, even though Scotland is part of Britain. I managed to convince my late husband to STOP doing that; and even had him to where he agreed there was no such thing as a single "English accent" any more than there is a single "American accent", or a single "Australian accent". (The latter he knew, because of my family .. I have one accent, my sister-in-law has a different accent, my daughter-in-law another different accent, my BFF a different accent again; but we're all Australians speaking Australian English.)