I don’t detect people leaving. I regularly cycle with a group made up of many working immigrants with a good career here in the U.K. They love it, feel part of the make up of the country and have absolutely no intention of leaving.And the free racism. No matter how much as leavers protest their vote was not about racism, the immigrants don't see it that way. The very obvious upset and sense of rejection those here already felt about the vote, and that very large numbers who've already left for home have made that clear.
It's made the UK a much less desirable destination for many, especially those who already had relatives or friends here or leaving.
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Mine might only be a small sample, maybe a dozen people, but the above is the impression I get.