Tug, the government has calculated the economic benefit of immigration to amount to 62 pence per citizen, which hardly compensates for the problems that have arisen in school provision, housing crisis, health care, social unrest etc.
We have overtaken Holland in population density. USA Germany and France have much lower densities than us.
Bangla Desh is higher.
Perhaps you could develope your proposition with some evidence and comparisons.

Overall, the UK's population will grow by almost 2 million over the next five years, even allowing for the recent, perhaps temporary, fall in immigration. How will we provide homes, schools, hospitals, houses,.....?