This and promised saviour against immigrants didn't had happened, pretty opposite, number of immigrants had increased seriously, no joke here.The eu literally did nothing. The UK left and now don't get benefits from the common market. That all.
A. Short term workers in " essential " niches based on short term contracts. Best example here fruits pickers from Moldova, Ukr etc....
B. Skilled immigrants with education and experience still are getting visas and permits and are continuing to push locals from office type jobs....realpolitik.
C. Immigrants investing in business are doing the same as before Brexit...
Yes, brexit might had helped to reduce number of euro origin dishwashers but in no case number of chiefs and specialists in offices.