Royston and Don, I said England was about the most densely populated nation on Earth.
I was not comparing it with Saudi Arabia?!
Among major nations, England comes third in density after Bangla Desh and South Korea.
It is double that of Germany and quadruple ythat of France.

So I was right in what I said.

You ask me to justify that current (10-15years) levels of immigration are unprecedented in our history.
They are.
I could offer you periods when it was less, but I doubt that would satisfy you.
Why not prove me wrong by finding a period when it was higher.
Good luck!