This won’t end well, because in spite of the tone of debate on migration, we desperately need migrants. In building, we still suffer a skills shortage: not enough UK citizens have bricklaying, plumbing, and roofing skills to build anywhere near as many houses as we need. The casual racist might continue to push the evidence-free argument that the housing crisis is caused by an increase in migration putting pressure on housing even though this has been debunked time and again, but if migrants leave it will become even more difficult to staff building sites and complete houses, and house prices will rise yet again.
There is a strange and worrying tendancy particularly amongst some people who would presumably be in favour of sustainability and dealing with man-made climate breakdown, to utterly refuse to accept that population growth is a problem. Incessant population growth puts a strain on resources, increases our impact on the environment and is not needed to support the economy. The UK finds itself in the bizarre situation of building smaller and smaller houses, increasing densification and rising traffic congestion. We do not need population growth!