From the New York Times:

Britain Is an Immigrant Nation

By RACHEL SHABI MARCH 9, 2017

Not until recently.

This is the kind of thing we can get hard statistics on these days through genome analysis, and the weight of evidence suggests that Britain’s population in 1950 was very heavily descended from its population in 1100.

Of course, Ms. Shabi’s definition of “immigrant” is as broad as Led Zeppelin’s:

In a larger way, of course, the very story of Britain has always been one of migrants. Poke around behind Britain’s currently rigid surface of chauvinism and a composite picture emerges — of Romans, Vikings, Celts, Normans, Jews, Indians, Chinese, Africans and more.

Actually, Britain has traditionally been an Emigrant Nation, with Brits settling large swathes of the world.

Who is Rachel Shabi, you might ask? She is the author of We Look Like the Enemy: The Hidden Story of Israel’s Jews from Arab Lands.