Please don't use "English" as a generic label though.
THAT's what I was always trying to avoid! LOL So I used Brits. I have a friend from Scotland and one from Wales---who now lives in London---and Brit just seemed easier.
On teeth: I have no idea. My friend from Wales is super pretty, very blond natural hair, etc and very straight and pretty teeth. She lived here in the States for a while and went to the dentist for some kind of retainer. I said 'your teeth are perfectly straight!" She yes, "Yes, but I want them to be American straight."
What does that even mean?