In general, rural areas in England voted to leave while cities voted to remain. Immigrants are more likely to come to cities rather than the countryside. Those

In general, rural areas in England voted to leave while cities voted to remain. Immigrants are more likely to come to cities rather than the countryside. Those that work in the countryside are more likely to be seasonal labourers. That said, I don't think the immigrant numbers are so high to have made that big of a difference. The UK population is >60M.