https://www.bbc.co.uk/news/articles/c0mzdejg1d3o
I have to confess I am seeing the end result of this problem with M.Sc. students entering the workforce with a level of English such that academic reports require significant edits to make them acceptable.
The employees are incredibly intelligent especially mathematically but the poor English is something that requires resource to address and you simply can't bring the subject up in a PDR without accusations of racism. I can't simply say as a development objective to improve Englsih as there isn't time in a demanding career and it becomes increasingly difficult to learn foreign languages as you age.
I am glad this subject is being raised as it does undermine HE institutions in my opinion.