From Wikipedia:

"Tourism in the United Kingdom is a major industry and contributor to the U.K. economy, which is the world's 10th biggest tourist destination, with over 40.1 million visiting in 2019, contributing a total of £234 billion to the GDP"

Like the US, I think there are multiple interest groups, not all of whom are interested in seeing "aliens" on British streets. I was named a "Highly Skilled Migrant" by Her Majesty's Government of the United Kingdom and Northern Ireland and paid a fair amount of money to the University of Liverpool and yet, never got the feeling I was in any way anything other than a foreigner.