I think my main point remains. The UK would have a declining population without significant immigration to boost numbers, especially at the younger age range. Without immigration there would be fewer workers to do all kinds of necessary jobs (including in the NHS and care sectors) and pay taxes to support public services. This has consequences: the UK culture will change over time and cultural differences will impact on politics. Governments have been slow to respond - partly because they fear the voters - and have failed to develop housing and other facilities to meet population increase from immigration. The Tories weaponized immigration in an attempt to hang on to power while doing nothing.
“We are killing like we haven’t killed since 1967”



