No, not illegal aliens. But yes, they also are upset as they wished to use EU free-travel zone to wiggle their way into the UK.
But European Commission president, Jean Claude Juncker actually meant space aliens. Read on...
According to the Express.UK:
"I have have seen, listened and heard many leaders of other planets and they are very worried because they wonder about the course the EU will follow.
"So we have to reassure both the Europeans and those who observe us from afar."
Later, he claimed that he meant to say leaders of our planet watching from afar and he messed up.
Well, after all French is his first language, and he was speaking French so it's an easy mistake to make — if you are suffering from some kind of delusional psychosis.
Which is more believable that the notion that he was trying to expose an alien presence on Earth who are keenly interested in the fishing rights of the British public, which seems to be the other popular theory.
When someone is trying to tell you that you only have two choices, it's usually because they are trying to sell you one of them.
And when the two choices you are offered are a) alien interest in local affairs, or b) a one long, complex slip of the tongue, it's time to for a certain someone to head to the prescription counter.