Well, we have gotten ourselves into a terrible mess over Brexit. The Conservative Party were refusing to release a series of technical notices on the impact of Brexit this week for fear of scaring the voters.
There is a history of racist and xenophobic policies behind this. The Windrush generation are named after one of the ships that transported large numbers of people from Commonwealth nations to the UK in the 1940s, 50s and 60s (see image above). This migration was encouraged, and was seen as mutually beneficial.