I don't quite understand why people need an article spelling out individual accepted facts that impact one another. Can't you not, or maybe you don't want to, join the dots yourself? It's like asking where babies come from!
I provided sources to back up what I said. They, and I, don't agree with your dots so I don't see why I should have to do your work for you as well as my own. However, I'll break it down for you to make things easier.
The ONS report I quoted
above estimated immigration as adding 282,000 people to a population of 66.6 million. As a percentage that works out at 0.427% of the population. Given that some of this is controlled according to your following paragraph, how much impact do you think the school age fraction of this fraction has on the education system by itself?
In other words, where do you think the majority of babies born in Britain come from?
I am well aware that there has been plenty of CONTROLLED migration, that's the migration the government plans and provisions for because they control it. That has not impacted school places because places are created for that increase. It's the UNCONTROLLED migration that has added that extra over capacity, that has in turn caused the percentage that now can't find places in schools. By the way, the number of children born to non UK born mothers was 28% in 2016 with Polish mothers being the biggest demographic, so questioning where all these children are coming from is ludicrous.
Don't suppose we'll get a source for this figure either, or any proof that one in four children born to non UK mums are the primary cause of overcrowding just because they're Polish. Or, most importantly, that those children outnumber other British born children to the extent that they're the primary cause of strain on the education system.
But if you absolutely need a source that says the word migration...
Any kind of source would be an improvement over the zero that you've provided thus far.
A
Mail article? Well, I guess it's a start... now you have to tie it into the EU, so you can blame it on remainers.
This only says EU in the headline, not in Priti Patel's words, and her claim is immediately rubbished by Migrants' Rights Networks in the article who presumably have done their own research and reached conflicting conclusions.
Given all this, why should anyone believe a word you say when you claim that:
Ironically the increase is school children is totally down to our membership of the EU and nothing else, something remainers love with a passion. Evidently they don't have children.
If something is evidently true it requires incontrovertible evidence, not just the word of some politician with a leaver's axe to grind. Is that too much to ask?