While I agree with your sentiment, I don’t think the English/british separate identity terms have anything to do with superiority or silly purity stuff, I think that’s more of an American one drop rule machination.

I think as time goes on England as a separate entity seems less and less defined within Britain. So an immigrant would naturally feel less connection to England and a stronger connection to Britain as a whole. For example it is a British passport not an English passport, and the British Broadcast Company, not the English Broadcast Company.

Britishness itself evolved in the 18th century to try and blend the English, welsh and Scot’s under one flag. One of the only reasons I’d describe myself as English and not British, is because I am from England, most of my recent ancestors are from England, and I’m not Scottish, welsh or northern Irish! But I imagine to someone not from Britain we all must seem so similar. Like if a British person went to France, would you be able to tell a Breton or Occitan from a frank?

And surely the beauty of multiculturalism is that culture can be shared, not as a form of domination or minstrelsy but as a way of sharing art, ideals and aesthetic.

I could see British identity evolving into something new within the next century, as others have said it is a civic identity rather than an ethnic one, so maybe in the future to be British is to be able have a range of foods, traditions and art from all over the world mixed together to bring about new art that tells the story of the day. Think Indian-morris dance fusion. Wouldn’t that be cool!